Stress Test
How many sprites can you display? And how does it effect the frame rate and memory usage of your scratch. Test it with this example.
It also shows how to animate a sprite.
On your own computer only. This project loads its pictures from the folder next to the code, and a web page has no folder to read them from. The examples that do run in the browser — the tutorials and every page of the documentation — use built-in pictures and sounds instead.