Made buffer's dot private

examples/color/main.go

@@ -47,8 +47,7 @@ func redraw () {
 	text := "RAINBOW :D"
 	width, height := application.Size()
 	
-	application.Dot.X = (width - len(text)) / 2
-	application.Dot.Y = height / 2
+	application.SetDot((width - len(text)) / 2, height / 2)
 	fmt.Fprintln(application, text)
 
 	application.SetColor(0, 0, stone.ColorYellow)

examples/hello/main.go

@@ -55,7 +55,7 @@ func main () {
 func redraw () {
 	currentTime = time.Now()
 
-	application.ResetDot()
+	application.SetDot(0, 0)
 	fmt.Fprintln(application, "hellorld!")
 
 	hour   := currentTime.Hour()