diff --git a/internal/util/itype/const.go b/internal/util/itype/const.go
new file mode 100644
index 0000000..11f84f2
--- /dev/null
+++ b/internal/util/itype/const.go
@@ -0,0 +1,5 @@
+package itype
+
+var (
+	ProjectName = "Gl01-igExp"
+)
diff --git a/main.go b/main.go
index dc3e106..a5451ab 100644
--- a/main.go
+++ b/main.go
@@ -17,7 +17,6 @@ var (
 	frameTick *time.Ticker
 )
 
-
 func init() {
 	runtime.LockOSThread()
 }
@@ -44,7 +43,7 @@ func main() {
 	glfw.WindowHint(glfw.ContextVersionMinor, 3)
 	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
 	glfw.WindowHint(glfw.OpenGLForwardCompatible, 1)
-	win, err := glfw.CreateWindow(gio.MainConfig.WindowWidth, gio.MainConfig.WindowHeight, "Gl01", nil, nil)
+	win, err := glfw.CreateWindow(gio.MainConfig.WindowWidth, gio.MainConfig.WindowHeight, itype.ProjectName, nil, nil)
 	if err != nil {
 		panic(err)
 	}
@@ -66,9 +65,9 @@ func main() {
 	game := game.NewGame()
 	game.Init(win)
 
-	gio.ClearColor = itype.Vec4f{0.6, 0.8, 1.0, 1.0}
-	gio.FogColor = itype.Vec4f{0.6, 0.8, 1.0, 1.0}
-	gl.ClearColor(0.6, 0.8, 1.0, 1)
+	gio.ClearColor = itype.Vec4f{0, 0, 0, 1.0}
+	gio.FogColor = itype.Vec4f{0, 0, 0, 1.0}
+	gl.ClearColor(gio.ClearColor[0], gio.ClearColor[1], gio.ClearColor[2], gio.ClearColor[3])
 	gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
 	win.SwapBuffers()
 	winClock := time.Now()
@@ -82,7 +81,7 @@ func main() {
 		winClock = time.Now()
 		game.Update(win, deltaTime)
 
-		gl.ClearColor(0.6, 0.8, 1.0, 1)
+		gl.ClearColor(gio.ClearColor[0], gio.ClearColor[1], gio.ClearColor[2], gio.ClearColor[3])
 		gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
 
 		game.Render(win)
@@ -91,7 +90,7 @@ func main() {
 		glfw.PollEvents()
 
 		if time.Since(fpsClock) >= time.Second {
-			win.SetTitle(fmt.Sprintf("Gl01 %dFPS", fpsCounter))
+			win.SetTitle(fmt.Sprintf(itype.ProjectName+" %dFPS", fpsCounter))
 			fpsCounter = 0
 			fpsClock = time.Now()
 		} else {