by steps
000000 000000
000000
f920f4 f920f4
f920f4
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f00
007f7f 007f7f
007f7f
f821f3 f821f3
f821f3
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
f822f3 f822f3
f822f3
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
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7f007f
f823f2 f823f2
f823f2
7f00ff 7f00ff
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7f7f7f
f825f2 f825f2
f825f2
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7f7fff
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7fffff 7fffff
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f726f2
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ff00ff
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f727f1
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
f728f1 f728f1
f728f1
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
f72af1 f72af1
f72af1