Answer:
I can be simple or I can be complex. I can be found in this riddle or in everyday life. I can be shapes or even colors.
I am used when you jump off a bridge for fun.
The more you take, the more you leave behind. What are they?
What goes up a chimney down but can't go down a chimney up?
If you have it, you donβt share it. If you share it, you donβt have it. What is it?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.