by steps
000000 000000
000000
72870d 72870d
72870d
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
70870e 70870e
70870e
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
6f880f 6f880f
6f880f
00ffff 00ffff
00ffff
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7f0000
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7f007f
6e8910 6e8910
6e8910
7f00ff 7f00ff
7f00ff
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7f7f00
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7f7f7f
6d8a11 6d8a11
6d8a11
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7f7fff
7fff00 7fff00
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7fff7f
7fffff 7fffff
7fffff
6b8a12 6b8a12
6b8a12
ff0000 ff0000
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ff007f
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ff00ff
6a8b13 6a8b13
6a8b13
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
698c14 698c14
698c14
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
688d16 688d16
688d16