by steps
000000 000000
000000
748a0a 748a0a
748a0a
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
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728b0b 728b0b
728b0b
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
718c0c 718c0c
718c0c
00ffff 00ffff
00ffff
7f0000 7f0000
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708d0d 708d0d
708d0d
7f00ff 7f00ff
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6f8f0e 6f8f0e
6f8f0e
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7fffff 7fffff
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6d900f 6d900f
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6c9110 6c9110
6c9110
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6b9211 6b9211
6b9211
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
6a9413 6a9413
6a9413