by steps
000000 000000
000000
7f0000 7f0000
7f0000
00007f 00007f
00007f
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0000ff
007f00 007f00
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007f7f 007f7f
007f7f
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7c1e05
007fff 007fff
007fff
00ff00 00ff00
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00ff7f 00ff7f
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7a3d0b 7a3d0b
7a3d0b
00ffff 00ffff
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7f007f 7f007f
7f007f
775c11 775c11
775c11
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757b17
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7fffff
72991c 72991c
72991c
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70b822 70b822
70b822
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6dd728 6dd728
6dd728
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
6bf62e 6bf62e
6bf62e