Hi,I made a little code to animate balls but i'm wondering :How can i remove the tiny and ugly white trail when circles cross ?

Question

https://code.sololearn.com/WE8si3YuuNMa/?ref=app

Answer 1

You are erasing the old ball position with a white circle, which is making your trail. Try this:
https://code.sololearn.com/WKEQeejUhobU

Answer 2

Oh right, thanks so much :-)