How to make bouncing balls?

[Soloh]

i have to do ball Flying left, and when it reach wall it return

[Chrisir]

Hello, and welcome to the forum!

Nice to have you here.

You need a Sketch with setup and draw.

Please use ellipse command to draw a circle:

ellipse (100,100,10,10);

See reference

Then replace the y value with a variable y and say y--;

[jeremydouglass]

@Soloh

ball Flying left, and when it reach wall it return

Processing has several “bouncing” examples:

• Bounce / Examples / Processing.org
• Bouncing Ball with Vectors / Examples / Processing.org

The term for knowing when to bounce is “collision detection.” You can find several good tutorials on collision detection in Processing with examples, here is one:

Collision Detection