by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
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007f7f
7c728f 7c728f
7c728f
007fff 007fff
007fff
00ff00 00ff00
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00ff7f
79659f 79659f
79659f
00ffff 00ffff
00ffff
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713ecf 713ecf
713ecf
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6f31df 6f31df
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
6c24ef 6c24ef
6c24ef
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
6a18ff 6a18ff
6a18ff