by steps
000000 000000
000000
00ffff 00ffff
00ffff
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
10efee 10efee
10efee
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
20dfdd 20dfdd
20dfdd
7f0000 7f0000
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7f007f
31cfcc 31cfcc
31cfcc
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7f7f00
7f7f7f 7f7f7f
7f7f7f
41bfbb 41bfbb
41bfbb
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7f7fff
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7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
51afaa 51afaa
51afaa
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ff00ff
629f99 629f99
629f99
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
728f88 728f88
728f88
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
838078 838078
838078