by steps
000000 000000
000000
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ffff7f
00007f 00007f
00007f
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0000ff
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e7eb70
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00ff7f
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d0d861
00ffff 00ffff
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899e35 899e35
899e35
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728b27 728b27
728b27
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
5a7818 5a7818
5a7818
ffff00 ffff00
ffff00
ffffff ffffff
ffffff
43650a 43650a
43650a