27: 1 , 2 , 3 , 5 , 6 , 7 ______ --27: 4 , 8
1 _ 2 _ 3 _ 4 _ 5 _ 6 _ 7 _ 8 _ 8a _ 9 _ 10 on a9a9a9 _ 11 on 550000
lines8, 8a, 10 and 11 all different horizontals
lines9 all different speeds, eventually
less subtle ones:
12 _ 13 _ 14 _ 15 _ 16 _ 16a _ 17 _ 17a _ 18 _ 18a _ 19
horizontal pattern studies: 20 _ 20a _ 20b _ 20c _ 20d _ 20e _ 20f
lines8, 8a, 10 and 11 all different horizontals
lines9 all different speeds, eventually
less subtle ones:
12 _ 13 _ 14 _ 15 _ 16 _ 16a _ 17 _ 17a _ 18 _ 18a _ 19
horizontal pattern studies: 20 _ 20a _ 20b _ 20c _ 20d _ 20e _ 20f
for slight changes and to #000011 darkblue backgrounds
2 _ 4 _ 5 _ 6 _ 7