diff --git a/main.go b/main.go
index 4d12040..076528a 100644
--- a/main.go
+++ b/main.go
@@ -1,29 +1,33 @@
 package main
 
 import (
-	"fmt"
+	// "fmt"
+	// "github.com/gdamore/tcell/v2"
 	"github.com/rivo/tview"
 )
 
 var (
 	// Translate
 	translator Translator
-	// TUI
+	// UI
 	app      = tview.NewApplication()
-	src_box  = tview.NewInputField()
+	src_box  = tview.NewTextArea()
 	dest_box = tview.NewTextView()
+	window   Window
 )
 
 func main() {
 	translator.src_lang = "English"
 	translator.dest_lang = "Chinese (Traditional)"
-	result, _ := translator.Translate("Hello world\nApple\nbumper")
-	fmt.Println(result)
-	// if err := app.SetRoot(
-	// 	tview.NewFlex().SetDirection(tview.FlexRow).
-	// 		AddItem(src_box, 0, 1, true).
-	// 		AddItem(dest_box, 0, 6, false),
-	// 	true).EnableMouse(true).Run(); err != nil {
-	// 	panic(err)
-	// }
+	// result, _ := translator.Translate("Hello world\nApple\nbumper")
+	// fmt.Println(result)
+	window.color_init()
+	ui_init()
+	if err := app.SetRoot(
+		tview.NewFlex().SetDirection(tview.FlexColumn).
+			AddItem(src_box, 0, 1, true).
+			AddItem(dest_box, 0, 1, false),
+		true).EnableMouse(true).Run(); err != nil {
+		panic(err)
+	}
 }
diff --git a/ui.go b/ui.go
new file mode 100644
index 0000000..44d97e0
--- /dev/null
+++ b/ui.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"github.com/gdamore/tcell/v2"
+	// "github.com/rivo/tview"
+)
+
+type Colors struct {
+	background_color tcell.Color
+	foreground_color tcell.Color
+	border_color     tcell.Color
+}
+
+type Window struct {
+	src  Colors
+	dest Colors
+}
+
+func (w *Window) color_init() {
+	w.src.background_color = tcell.ColorDefault
+	w.src.border_color = tcell.NewHexColor(0xFBF1C7)
+	w.src.foreground_color = tcell.NewHexColor(0xFBF1C7)
+	w.dest.background_color = tcell.ColorDefault
+	w.dest.border_color = tcell.NewHexColor(0xFBF1C7)
+	w.dest.foreground_color = tcell.NewHexColor(0xFBF1C7)
+}
+
+func ui_init() {
+	src_box.SetBorder(true).
+		SetTitle(translator.src_lang).
+		SetBorderColor(window.src.border_color).
+		SetTitleColor(window.src.border_color)
+	src_box.SetBackgroundColor(window.src.background_color)
+	src_box.SetTextStyle(tcell.StyleDefault.
+		Background(window.src.background_color).
+		Foreground(window.src.foreground_color))
+
+	dest_box.SetBorder(true).
+		SetTitle(translator.dest_lang).
+		SetBorderColor(window.dest.border_color).
+		SetTitleColor(window.dest.border_color)
+	dest_box.SetBackgroundColor(window.dest.background_color)
+}