Make my yellow button grey (;

PLEASE COMMENT ON MY VIDS:)
SUB AIM:
05 [X] 55 [X]
10 [X] 60
15 [X] 65
20 [X] 70
25 [X] 75
30 [X] 80
35 [X] 85
40 [X] 90
45 [X] 95
50 [X] 100