by steps
000000 000000
000000
00ff00 00ff00
00ff00
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
0ffd0f 0ffd0f
0ffd0f
007fff 007fff
007fff
00ff7f 00ff7f
00ff7f
1ffc1e 1ffc1e
1ffc1e
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
2ffa2e 2ffa2e
2ffa2e
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
3ff93d 3ff93d
3ff93d
7f7fff 7f7fff
7f7fff
7fff00 7fff00
7fff00
7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
4ff74c 4ff74c
4ff74c
ff0000 ff0000
ff0000
ff007f ff007f
ff007f
ff00ff ff00ff
ff00ff
5ff65c 5ff65c
5ff65c
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6ff46b 6ff46b
6ff46b
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
7ff37b 7ff37b
7ff37b