by steps
000000 000000
000000
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00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
020314 020314
020314
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00ff7f
040728 040728
040728
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060a3c
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7f7f7f
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090e51
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7fffff 7fffff
7fffff
0b1265 0b1265
0b1265
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0d1579 0d1579
0d1579
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
0f198d 0f198d
0f198d
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
121da2 121da2
121da2