by steps
000000 000000
000000
ff7f00 ff7f00
ff7f00
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
f37f02 f37f02
f37f02
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
e87f05 e87f05
e87f05
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
dc7f08 dc7f08
dc7f08
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
d17f0b d17f0b
d17f0b
7f7fff 7f7fff
7f7fff
7fff00 7fff00
7fff00
7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
c57f0e c57f0e
c57f0e
ff0000 ff0000
ff0000
ff007f ff007f
ff007f
ff00ff ff00ff
ff00ff
ba7f11 ba7f11
ba7f11
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
ae7f14 ae7f14
ae7f14
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
a37f17 a37f17
a37f17