by steps
000000 000000
000000
728691 728691
728691
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00007f
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0000ff
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6c8691
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00ff7f
668692 668692
668692
00ffff 00ffff
00ffff
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7f007f
608793 608793
608793
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7fffff
558795 558795
558795
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ff7f7f
ff7fff ff7fff
ff7fff
498897 498897
498897
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
448998 448998
448998