by steps
000000 000000
000000
679616 679616
679616
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
689416 689416
689416
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
6a9217 6a9217
6a9217
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
6c9017 6c9017
6c9017
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
6e8e18 6e8e18
6e8e18
7f7fff 7f7fff
7f7fff
7fff00 7fff00
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7fff7f
7fffff 7fffff
7fffff
708c18 708c18
708c18
ff0000 ff0000
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728a19 728a19
728a19
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
748819 748819
748819
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
76871a 76871a
76871a