by steps
000000 000000
000000
758687 758687
758687
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00007f
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738788
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007fff
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00ff7f
728889 728889
728889
00ffff 00ffff
00ffff
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71898a 71898a
71898a
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708a8b
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7fffff
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6e8b8c
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6d8c8d 6d8c8d
6d8c8d
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ff7f00
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ff7f7f
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ff7fff
6c8d8e 6c8d8e
6c8d8e
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff
6b8e8f 6b8e8f
6b8e8f