by steps
000000 000000
000000
bf7920 bf7920
bf7920
00007f 00007f
00007f
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0000ff
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007f7f 007f7f
007f7f
bd7820 bd7820
bd7820
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
bc7821 bc7821
bc7821
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f
ba7822 ba7822
ba7822
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b97823 b97823
b97823
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7f7fff
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7fff7f
7fffff 7fffff
7fffff
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b77723
ff0000 ff0000
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b67724
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
b47725 b47725
b47725
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
b37726 b37726
b37726