is there class to custom the movement of the objects on the stage like the tween class in flash, so we can use it on the GUI issue and other 3D objects
Use Lerp to do linear interpolation on positions, which would give you your “tween” functionality.
file:///Applications/Unity/Documentation/ScriptReference/Mathf.Lerp.html
file:///Applications/Unity/Documentation/ScriptReference/Vector3.Lerp.html