by steps
000000 000000
000000
75895b 75895b
75895b
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
74895b 74895b
74895b
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
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7f007f
738a5b 738a5b
738a5b
7f00ff 7f00ff
7f00ff
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7f7f00
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7f7f7f
738a5c 738a5c
738a5c
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7f7fff
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7fff00
7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
728a5c 728a5c
728a5c
ff0000 ff0000
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ff00ff
728b5c 728b5c
728b5c
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
718b5c 718b5c
718b5c
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
718c5d 718c5d
718c5d