diff --git a/.gitignore b/.gitignore
index aaadf73..77f9775 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,7 +18,7 @@ coverage.*
 profile.cov
 
 # Dependency directories (remove the comment below to include it)
-# vendor/
+vendor/
 
 # Go workspace file
 go.work
@@ -28,5 +28,5 @@ go.work.sum
 .env
 
 # Editor/IDE
-# .idea/
-# .vscode/
+.idea/
+.vscode/
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..869bf76
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/tiennm99/time-changer
+
+go 1.25
+
+require fyne.io/fyne/v2 v2.7.2 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..65d767f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+fyne.io/fyne/v2 v2.7.2 h1:XiNpWkn0PzX43ZCjbb0QYGg1RCxVbugwfVgikWZBCMw=
+fyne.io/fyne/v2 v2.7.2/go.mod h1:PXbqY3mQmJV3J1NRUR2VbVgUUx3vgvhuFJxyjRK/4Ug=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..ce770b6
--- /dev/null
+++ b/main.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+)
+
+//TIP <p>To run your code, right-click the code and select <b>Run</b>.</p> <p>Alternatively, click
+// the <icon src="AllIcons.Actions.Execute"/> icon in the gutter and select the <b>Run</b> menu item from here.</p>
+func main() {
+	//TIP <p>Press <shortcut actionId="ShowIntentionActions"/> when your caret is at the underlined text
+	// to see how GoLand suggests fixing the warning.</p><p>Alternatively, if available, click the lightbulb to view possible fixes.</p>
+	s := "gopher"
+	fmt.Printf("Hello and welcome, %s!\n", s)
+
+	for i := 1; i <= 5; i++ {
+		//TIP <p>To start your debugging session, right-click your code in the editor and select the Debug option.</p> <p>We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
+		// for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.</p>
+		fmt.Println("i =", 100/i)
+	}
+}