This is self-explanatory. I swear I just slapped this together within two minutes https://scratch.mit.edu/projects/733445634/remixtree
RULES ------------------------------------------------------------------------- 1. Add your face. Grey only. (black and white dont exist, they are just shades of grey ;) 2. In order to claim your spot, choose an empty peak, remix, and put your face on it. 3. If all the positions are full, remix the original.