by steps
000000 000000
000000
71888c 71888c
71888c
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
72877e 72877e
72877e
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
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738671
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
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7f007f
748564 748564
748564
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7f7f7f
768457 768457
768457
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77834a
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ff7f7f
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ff7fff
798130 798130
798130
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
7b8123 7b8123
7b8123