I like to ruin things... heres the answer for 19...
**the colors may vary everytime you do the same level, but the patterns are the same.
answer for 19
edit:
here are the answer for 21-30 haha, i did them all again just to get these pics.
answer 21
answer 22
answer 23
answer 24
answer 25
answer 26
answer 27
answer 28
answer 29
answer 30