hii, i'm trying to make a simple game, in which i have created a scene of rotation of cube. Now i need to go to another scene or we can say nxt window after 'some time,(like we do in flash from one frame to nxt frame).

** Or In simple way when i 'll click on one window nxt window will appear, and when i'll click on second window another will come and so on...... ** how can do it?

Is there any tutorial or some example are here to help me..?

You probably want this: http://unity3d.com/support/documentation/ScriptReference/Application.LoadLevel.html

Look into Input.GetMouseDown for handling clicks