How do i make the brick to break in 4 piece

Guys idk about particle system yet but can someone teach me how to use gdevelop particle system?

you should set an action for broken brick animation to 4 or more than the number … that would work when you set a condition

Read through this wiki entry on particle systems first, and have a play with the examples linked in this page. If you have further questions, then post them in the forum.