by steps
000000 000000
000000
6f8989 6f8989
6f8989
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
708894 708894
708894
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
72879f 72879f
72879f
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
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7386aa
7f00ff 7f00ff
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7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
7585b5 7585b5
7585b5
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7f7fff
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7fff00
7fff7f 7fff7f
7fff7f
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7684c0
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7883cb 7883cb
7883cb
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
7982d6 7982d6
7982d6
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
7b81e1 7b81e1
7b81e1