by steps
000000 000000
000000
87668d 87668d
87668d
00007f 00007f
00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
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86658d
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007fff
00ff00 00ff00
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00ff7f
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86648e
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00ffff
7f0000 7f0000
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7f007f
86638f 86638f
86638f
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866390 866390
866390
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7fff7f 7fff7f
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7fffff
866290 866290
866290
ff0000 ff0000
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866191 866191
866191
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ff7f00
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ff7fff ff7fff
ff7fff
866092 866092
866092
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
866093 866093
866093