by steps
000000 000000
000000
728f71 728f71
728f71
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
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719070
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
70916f 70916f
70916f
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
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7f007f
6f936e 6f936e
6f936e
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7f00ff
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7f7f00
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7f7f7f
6e946d 6e946d
6e946d
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7f7fff
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7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
6d956c 6d956c
6d956c
ff0000 ff0000
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ff007f
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ff00ff
6c976b 6c976b
6c976b
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6b986a 6b986a
6b986a
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
6b9a6a 6b9a6a
6b9a6a