by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
78877b 78877b
78877b
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
728f78 728f78
728f78
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
6c9774 6c9774
6c9774
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
66a071 66a071
66a071
7f7fff 7f7fff
7f7fff
7fff00 7fff00
7fff00
7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
60a86d 60a86d
60a86d
ff0000 ff0000
ff0000
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ff007f
ff00ff ff00ff
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5ab06a 5ab06a
5ab06a
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
54b866 54b866
54b866
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
4ec163 4ec163
4ec163