edit the individual clone's behavior in the "behavior" function so, what's this about? an apple, scratch cat, following the mouse and a cake swinging around? basically, you can make one-sprite projects without EVER using clones. this allows you to go beyond scratch's 300 clones limit and do some crazy stuff. how this works is that lists store a clones properties such as position, direction, ect. every tick, they get updated by the "behavior" function and printed onto the stage using pen stamp. this is the most basic simple method i can think of (and build). if you know any other ways of doing this, do let me know!
