While back someone asked me if I knew anything about Physics and how to bind the Ball object in the boundary. I do not know much about Physics and its behaviors. Therefore I could not answer back soon. Now I have found a way to do that and here is the little demo. How to bind Ball in square or oblong boundary.
Create new project t and name it as you wish.
Set window size as you wish.
Create Sprite and name it Ball.
Set Ball Collision Mask to Bounding Box
Sprite behavior to Physics
Create another sprite and name it wall.
Sprite wall behavior set Physics also and not SOLID.
Set wall Collision Mask to Bounding Box
Using sprite wall create square or oblong as you like.
sprite wall, Ball behaviors
Your screen might looks like my demo
Set behaviors for both sprite as below
Your screen might looks like my demo
Now open Events and Enter code as BELOW
Not much code but C2 result is best. No other tool can do this with 2 line of codes. Only C2.
Test it. Now use your MOUSE to move around on screen and see the result