diff --git a/memorybase/another_mfile.mdem b/memorybase/another_mfile.mdem
index e69de29..309ce52 100644
--- a/memorybase/another_mfile.mdem
+++ b/memorybase/another_mfile.mdem
@@ -0,0 +1,245 @@
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+- [cap_est] What is the capital of Estonia? >
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+    - Tallin
+
diff --git a/memorybase/hello.mdem b/memorybase/hello.mdem
index e69de29..81bd617 100644
--- a/memorybase/hello.mdem
+++ b/memorybase/hello.mdem
@@ -0,0 +1,110 @@
+
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+
+- [cap_riga] What is the capital of Latvia? >
+    - Riga
+
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+- [cap_riga] What is the capital of Latvia? >
+    - Riga 
+
diff --git a/src/mdemory-app-qt/.vscode/launch.json b/src/mdemory-app-qt/.vscode/launch.json
new file mode 100644
index 0000000..0848317
--- /dev/null
+++ b/src/mdemory-app-qt/.vscode/launch.json
@@ -0,0 +1,23 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}"
+        },
+        {
+            "name": "Debug Go Program",
+            "type": "go",
+            "request": "launch",
+            "mode": "exec",
+            "program": "${workspaceFolder}/mdemory_debug",
+            "args": []
+        }
+    ]
+}
\ No newline at end of file
diff --git a/src/mdemory-app-qt/main.go b/src/mdemory-app-qt/main.go
index 19103ba..92bb0bc 100644
--- a/src/mdemory-app-qt/main.go
+++ b/src/mdemory-app-qt/main.go
@@ -1,5 +1,8 @@
 package main
 
+// TODO: open flashcard with many answers and switch mdem file,
+// it remains opens with the same options -> Rehide the answers.
+
 import (
 	"fmt"
 	"os"
@@ -12,31 +15,53 @@ import (
 	"github.com/therecipe/qt/widgets"
 )
 
-var mdems             []*widgets.QWidget
-var hMdemScroll       *widgets.QVBoxLayout
-var mdemSpacer        *widgets.QSpacerItem
+var hMdemScroll *widgets.QVBoxLayout
+var mdemSpacer *widgets.QSpacerItem
 var spacerInitialized bool = false
-var workingPath       string = "/home/jorenchik/Code/mdemory/memorybase"
+var workingPath string = "/home/jorenchik/Code/mdemory/memorybase"
 
-func CreateMdem(frontText string, backTexts []string) *widgets.QWidget {
-    // frontText := "What is the capital of Latvia?"
+type Mdem struct {
+	wMdem           *widgets.QWidget;
+	wFrontText      *widgets.QLabel;
+	wBack           *widgets.QWidget;
+	backLabels    []*widgets.QLabel;
+	showButton      *widgets.QToolButton;
+    labelCount      int;
+}
 
-    // DefineMdem
-    wMdem := widgets.NewQWidget(nil, 0)
-    vMdem := widgets.NewQVBoxLayout()
+var mdems []*Mdem
 
-    wMdem.SetLayout(vMdem)
-    id := fmt.Sprintf("mdem_%d", 1)
-    wMdem.SetObjectName(id)
+func (mdem *Mdem) showBacklabels() {
+    for i := range(len(mdem.backLabels)) {
+        if i < mdem.labelCount {
+            if !mdem.backLabels[i].IsVisible() {
+                mdem.backLabels[i].Show()
+            }
+        } else {
+            if mdem.backLabels[i].IsVisible() {
+                mdem.backLabels[i].Hide()
+            }
+        }
+    }
+}
 
-    // InitFront
-    wFront := widgets.NewQWidget(nil, 0)
-    hFront := widgets.NewQHBoxLayout()
-    wFront.SetMinimumHeight(60)
-    // wFront.SetMaximumHeight(60)
-    wFront.SetLayout(hFront)
-    wFront.SetProperty("first", core.NewQVariant1(true));
-    wMdem.SetStyleSheet(fmt.Sprintf(`
+func CreateMdem() *Mdem {
+
+	// DefineMdem
+	wMdem := widgets.NewQWidget(nil, 0)
+	vMdem := widgets.NewQVBoxLayout()
+
+	wMdem.SetLayout(vMdem)
+	id := fmt.Sprintf("mdem_%d", 1)
+	wMdem.SetObjectName(id)
+
+	// InitFront
+	wFront := widgets.NewQWidget(nil, 0)
+	hFront := widgets.NewQHBoxLayout()
+	wFront.SetMinimumHeight(60)
+	wFront.SetLayout(hFront)
+	wFront.SetProperty("first", core.NewQVariant1(true))
+	wMdem.SetStyleSheet(fmt.Sprintf(`
         QWidget#%s > QWidget {
             border-right:  1px solid gray;
             border-bottom: 1px solid gray;
@@ -47,174 +72,196 @@ func CreateMdem(frontText string, backTexts []string) *widgets.QWidget {
         }
     `, id, id))
 
-    // AddFrontContent
-    elFrontText := widgets.NewQLabel2(frontText, nil, 0)
-    hFront.AddWidget(elFrontText, 0, 0)
-    hFront.AddStretch(1)
-    hideButton := widgets.NewQToolButton(nil)
-    showAnswer := widgets.NewQToolButton(nil)
-    hideButton.SetText("Hide")
-    showAnswer.SetText("Show")
-    hFront.AddWidget(hideButton, 0, 0)
-    hFront.AddWidget(showAnswer, 0, 0)
+	// AddFrontContent
+	elFrontText := widgets.NewQLabel(nil, 0)
+	hFront.AddWidget(elFrontText, 0, 0)
+	hFront.AddStretch(1)
+	showAnswer := widgets.NewQToolButton(nil)
+	showAnswer.SetText("Show")
+	hFront.AddWidget(showAnswer, 0, 0)
 
-    wBack := widgets.NewQWidget(nil, 0)
-    hBack := widgets.NewQVBoxLayout()
-    // wBack.SetMinimumHeight(60)
-    wBack.SetLayout(hBack)
+	wBack := widgets.NewQWidget(nil, 0)
+	hBack := widgets.NewQVBoxLayout()
+	wBack.SetLayout(hBack)
+	vMdem.AddWidget(wBack, 0, 0)
 
-    vMdem.AddWidget(wBack, 0, 0)
-    // AddBackContent
-    for i := range(backTexts) {
-        backText := strings.Trim(backTexts[i], " \t\n")
-        elBackText := widgets.NewQLabel2(
-            fmt.Sprintf("- %s", backText),
-            nil,
-            0,
-        )
+	// AddBackContent
+    var backLabels []*widgets.QLabel
+    for range(20) {
+        elBackText := widgets.NewQLabel(nil, 0)
         hBack.AddWidget(elBackText, 0, 0)
+        backLabels = append(backLabels, elBackText)
     }
-    hBack.AddStretch(1)
 
-    vMdem.AddWidget(wFront, 0, 0)
-    vMdem.AddWidget(wBack, 0, 0)
-    vMdem.SetContentsMargins(0,0,0,0)
-    vMdem.SetSpacing(0)
+	vMdem.AddWidget(wFront, 0, 0)
+	vMdem.AddWidget(wBack, 0, 0)
+	vMdem.SetContentsMargins(0, 0, 0, 0)
+	vMdem.SetSpacing(0)
 
 
-    wBack.Hide()
-    hideButton.ConnectClicked(func(checked bool) {
-        if wBack.IsVisible() {
-            wBack.Hide()
-        }
-    })
-    showAnswer.ConnectClicked(func(checked bool) {
-        if !wBack.IsVisible() {
-            wBack.Show()
+	wBack.Hide()
+	wMdem.Hide()
+    mdem := Mdem{
+		wMdem,
+		elFrontText,
+		wBack,
+        backLabels,
+        showAnswer,
+        0,
+	}
+
+    mdem.showButton.ConnectClicked(func(checked bool) {
+        if mdem.wBack.IsVisible() {
+            mdem.wBack.Hide()
+            mdem.showButton.SetText("Show")
+        } else {
+            mdem.wBack.Show()
+            mdem.showButton.SetText("Hide")
         }
+        mdem.showBacklabels()
     })
 
-    return wMdem
+    return &mdem
 }
 
-    
 func CreateMdems(questions *[]parser.Question) {
-    if spacerInitialized {
-        hMdemScroll.RemoveItem(mdemSpacer)
-    }
-    for i := range(mdems) {
-        hMdemScroll.RemoveWidget(mdems[i])
-        mdems[i].Hide()
-        mdems[i].DeleteLater()
-    }
+	if spacerInitialized {
+		hMdemScroll.RemoveItem(mdemSpacer)
+	} else {
+		mdemSpacer = widgets.NewQSpacerItem(
+			0, 0, widgets.QSizePolicy__Maximum, widgets.QSizePolicy__Minimum,
+		)
+	}
 
-    // destroy widgets
-    mdems = nil 
-    for i := range(*questions) {
-        question := (*questions)[i]
-        switch question.(type) {
-        case parser.SingleAnswerQuestion:
-            mdems = append(
-                mdems,
-                CreateMdem(
-                    question.(parser.SingleAnswerQuestion).Question,
-                    []string{
-                        question.(parser.SingleAnswerQuestion).Answer,
-                    },
-                ),
-            )
-        case parser.MultipleChoiceQuestion:
-            var answers []string
-            choices := question.(parser.MultipleChoiceQuestion).Choices
-            for i := range(choices) {
-                answers = append(answers, choices[i].Answer)
-            }
-            mdems = append(
-                mdems,
-                CreateMdem(
-                    question.(parser.MultipleChoiceQuestion).Question,
-                    answers,
-                ),
-            )
+	for i := range mdems {
+        if mdems[i].wMdem.IsVisible() {
+            mdems[i].wMdem.Hide()
+        }
+	}
+
+    if len(*questions) > len(mdems) {
+        for range(len(*questions) - len(mdems)) {
+            mdem := CreateMdem()
+            mdems = append(mdems, mdem) 
+            hMdemScroll.AddWidget(mdem.wMdem, 0, 0)
         }
     }
-    for i := 0; i < len(mdems); i++ {
-        hMdemScroll.AddWidget(mdems[i], 0, 0)
-    }
 
-    if !spacerInitialized {
-        mdemSpacer = widgets.NewQSpacerItem(
-            40,
-            40,
-            widgets.QSizePolicy__Minimum,
-            widgets.QSizePolicy__Expanding,
-        )
-        spacerInitialized = true
-    }
-    hMdemScroll.AddItem(mdemSpacer)
+	for i := range *questions {
+		question := (*questions)[i]
+		switch question.(type) {
+		case parser.SingleAnswerQuestion:
+			mdems[i].wFrontText.SetText(
+				question.(parser.SingleAnswerQuestion).Question,
+			)
+            answer := strings.Trim(
+                question.(parser.SingleAnswerQuestion).Answer, " \t\n",
+            ) 
+			mdems[i].backLabels[0].SetText(answer)
+            if mdems[i].wBack.IsVisible() {
+                mdems[i].wBack.Hide()
+            }
+            mdems[i].labelCount = 1
+		case parser.MultipleChoiceQuestion:
+			choices := question.(parser.MultipleChoiceQuestion).Choices
+			mdems[i].wFrontText.SetText(
+				question.(parser.MultipleChoiceQuestion).Question,
+			)
+			for k := range choices {
+                answer := strings.Trim(choices[k].Answer, " \t\n") 
+				if k < len(mdems[i].backLabels) {
+					mdems[i].backLabels[k].SetText(answer)
+				} else {
+					label := widgets.NewQLabel2(answer, nil, 0)
+					mdems[i].backLabels = append(
+						mdems[i].backLabels,
+						label,
+					)
+					mdems[i].wBack.Layout().AddWidget(label)
+				}
+			}
+            mdems[i].labelCount = len(choices)
+		}
+        if !mdems[i].wMdem.IsVisible() {
+            mdems[i].wMdem.Show()
+        }
+	}
+
+	if !spacerInitialized {
+		mdemSpacer = widgets.NewQSpacerItem(
+			40,
+			40,
+			widgets.QSizePolicy__Minimum,
+			widgets.QSizePolicy__Expanding,
+		)
+		spacerInitialized = true
+	}
+	hMdemScroll.AddItem(mdemSpacer)
 }
 
-
 func main() {
-	// InitApp 
-	app       := widgets.NewQApplication(len(os.Args), os.Args)
-	window    := widgets.NewQMainWindow(nil, 0)
+	// InitApp
+	app := widgets.NewQApplication(len(os.Args), os.Args)
+	window := widgets.NewQMainWindow(nil, 0)
 	hSplitter := widgets.NewQSplitter(nil)
 	window.SetWindowTitle("MDemory")
 	window.SetMinimumSize2(400, 300)
 
 	leftWidget := widgets.NewQWidget(nil, 0)
 	leftLayout := widgets.NewQVBoxLayout()
-	mdemLabel  := widgets.NewQLabel2("Mdems", nil, 0)
-	model      := widgets.NewQFileSystemModel(nil)
-	mdemList   := widgets.NewQTreeView(nil)
+	mdemLabel := widgets.NewQLabel2("Mdems", nil, 0)
+	model := widgets.NewQFileSystemModel(nil)
+	mdemList := widgets.NewQTreeView(nil)
 	leftWidget.SetLayout(leftLayout)
 	leftLayout.AddWidget(mdemLabel, 0, 0)
-    model.SetRootPath(workingPath)
+	model.SetRootPath(workingPath)
 	mdemList.SetModel(model)
 
-    rootIndex := model.Index2("/home/jorenchik/Code/mdemory/memorybase", 0)
-    fmt.Printf("Root index: %s\n", model.FileName(rootIndex))
-    mdemList.SetRootIndex(rootIndex)
+	rootIndex := model.Index2("/home/jorenchik/Code/mdemory/memorybase", 0)
+	fmt.Printf("Root index: %s\n", model.FileName(rootIndex))
+	mdemList.SetRootIndex(rootIndex)
 
-    mdemList.HideColumn(1)
-    mdemList.HideColumn(2)
-    mdemList.HideColumn(3)
+	mdemList.HideColumn(1)
+	mdemList.HideColumn(2)
+	mdemList.HideColumn(3)
 	mdemList.ConnectDoubleClicked(func(index *core.QModelIndex) {
-        if model.IsDir(index) {
-            return
-        }
-        filePath := model.FilePath(index)
-        fileContents, err := os.ReadFile(filePath)
-        if (err != nil) {
-            widgets.QMessageBox_Critical(
-                nil,
-                "Compilation error",
-                err.Error(),
-                widgets.QMessageBox__Ok,
-                widgets.QMessageBox__Ok,
-            )
-            return
-        }
-        start := time.Now().UnixMicro()
-        questions, err := api.Compile(string(fileContents))
-        if (err != nil) {
-            widgets.QMessageBox_Critical(
-                nil,
-                "Compilation error",
-                err.Error(),
-                widgets.QMessageBox__Ok,
-                widgets.QMessageBox__Ok,
-            )
-            return
-        }
-        duration := float32(time.Now().UnixMicro() - start) / 1000
-        fmt.Printf("Compilation took %.3fms", duration)
-        CreateMdems(&questions)
+		if model.IsDir(index) {
+			return
+		}
+		filePath := model.FilePath(index)
+		fileContents, err := os.ReadFile(filePath)
+		if err != nil {
+			widgets.QMessageBox_Critical(
+				nil,
+				"Compilation error",
+				err.Error(),
+				widgets.QMessageBox__Ok,
+				widgets.QMessageBox__Ok,
+			)
+			return
+		}
+		start := time.Now().UnixMicro()
+		questions, err := api.Compile(string(fileContents))
+		if err != nil {
+			widgets.QMessageBox_Critical(
+				nil,
+				"Compilation error",
+				err.Error(),
+				widgets.QMessageBox__Ok,
+				widgets.QMessageBox__Ok,
+			)
+			return
+		}
+		duration := float32(time.Now().UnixMicro()-start) / 1000
+		fmt.Printf("Compilation took %.3fms", duration)
+        
+        // Take a slice (mock pagination for now)
+        questions = questions[0:10]
+		CreateMdems(&questions)
 	})
 
 	deckLabel := widgets.NewQLabel2("Decks", nil, 0)
-	deckList  := widgets.NewQListView(nil)
+	deckList := widgets.NewQListView(nil)
 	leftLayout.AddWidget(mdemList, 1, 0)
 	leftLayout.AddWidget(deckLabel, 0, 0)
 	leftLayout.AddWidget(deckList, 1, 0)
@@ -223,17 +270,17 @@ func main() {
 	rightLayout := widgets.NewQVBoxLayout()
 	rightWidget.SetLayout(rightLayout)
 
-	top           := widgets.NewQWidget(nil, 0)
-	hTop          := widgets.NewQHBoxLayout()
+	top := widgets.NewQWidget(nil, 0)
+	hTop := widgets.NewQHBoxLayout()
 	deckListLabel := widgets.NewQLabel2("Mdem: file.mdem", nil, 0)
 	top.SetLayout(hTop)
 	rightLayout.AddWidget(top, 0, 0)
 
 	hTop.AddWidget(deckListLabel, 0, 0)
 	hTop.AddStretch(1)
-	refresh  := widgets.NewQToolButton(nil)
+	refresh := widgets.NewQToolButton(nil)
 	practice := widgets.NewQToolButton(nil)
-    shuffle  := widgets.NewQToolButton(nil)
+	shuffle := widgets.NewQToolButton(nil)
 	hTop.AddWidget(refresh, 0, 0)
 	hTop.AddWidget(shuffle, 0, 0)
 	hTop.AddWidget(practice, 0, 0)
@@ -241,42 +288,48 @@ func main() {
 	shuffle.SetText("Shuffle")
 	practice.SetText("Practice")
 
-	mdemScroll    := widgets.NewQScrollArea(nil)
-    mdemContainer := widgets.NewQWidget(nil, 0)
+	mdemScroll := widgets.NewQScrollArea(nil)
+	mdemContainer := widgets.NewQWidget(nil, 0)
 	hMdemScroll = widgets.NewQVBoxLayout()
-    mdemScroll.SetWidget(mdemContainer)
-    mdemScroll.SetWidgetResizable(true)
+	mdemScroll.SetWidget(mdemContainer)
+	mdemScroll.SetWidgetResizable(true)
 	mdemContainer.SetLayout(hMdemScroll)
 
-    // CreateMdems
-    rightLayout.AddWidget(mdemScroll, 1, 0)
-    // CreateMdems(nil, hMdemScroll)
+	for i := 0; i < 40; i++ {
+        mdem := CreateMdem()
+		mdems = append(
+			mdems,
+            mdem,
+		)
+        hMdemScroll.AddWidget(mdem.wMdem, 0, 0)
+	}
 
-    // Pagination 
-	pagination  := widgets.NewQWidget(nil, 0)
+	rightLayout.AddWidget(mdemScroll, 1, 0)
+	// Pagination
+	pagination := widgets.NewQWidget(nil, 0)
 	hPagination := widgets.NewQHBoxLayout()
 	pagination.SetLayout(hPagination)
 
-    // TEMP: mock pagination
-    prevButton := widgets.NewQToolButton(nil)
-    prevButton.SetText("<")
-    hPagination.AddWidget(prevButton, 0, 0)
+	// TEMP: mock pagination
+	prevButton := widgets.NewQToolButton(nil)
+	prevButton.SetText("<")
+	hPagination.AddWidget(prevButton, 0, 0)
 	for i := 0; i < 5; i++ {
 		button := widgets.NewQToolButton(nil)
 		button.SetText(fmt.Sprintf("%d", i+1))
 		hPagination.AddWidget(button, 0, 0)
 	}
-    nextButton := widgets.NewQToolButton(nil)
-    nextButton.SetText(">")
-    hPagination.AddWidget(nextButton, 0, 0)
+	nextButton := widgets.NewQToolButton(nil)
+	nextButton.SetText(">")
+	hPagination.AddWidget(nextButton, 0, 0)
 
 	hPagination.AddStretch(1)
 	rightLayout.AddWidget(pagination, 0, 0)
 
 	hSplitter.AddWidget(leftWidget)
 	hSplitter.AddWidget(rightWidget)
-    hSplitter.SetStretchFactor(0, 1)
-    hSplitter.SetStretchFactor(1, 3)
+	hSplitter.SetStretchFactor(0, 1)
+	hSplitter.SetStretchFactor(1, 3)
 	window.SetCentralWidget(hSplitter)
 
 	window.Show()
diff --git a/src/mdemory-app-qt/mdemory-app-qt b/src/mdemory-app-qt/mdemory-app-qt
index 172f9d8..2293b57 100755
Binary files a/src/mdemory-app-qt/mdemory-app-qt and b/src/mdemory-app-qt/mdemory-app-qt differ
diff --git a/src/mdemory-app-qt/mdemory_debug b/src/mdemory-app-qt/mdemory_debug
new file mode 100755
index 0000000..bf52d4e
Binary files /dev/null and b/src/mdemory-app-qt/mdemory_debug differ