Some Random Nerds closed

Back with some random designs that I can't make sense of either  

1 2 3 4
5 6 7 8
9 10 11 12

1 is closed
3 is closed
4 is closed
5 is closed
6 is closed
7 is closed
8 is closed
10 is closed
12 is closed

Little nerds are 10 a piece C: payment is through my commission button!
Lines are by someone else, but I either can't find it or they removed it ;w; if you know/remember please tell me!