35 lights, 7 lines, 1 for each 5
divided into 7 groups of 5 and centered on each group

divide into 10 groups of 10 and center on each group
divide into 5 groups of 20 and center on each group

+ 1
+ 16
+ 33
+ 50
+ 66
+ 83 
+ 100

00
09
19
29
39
49
59
69
79
89
99