by steps
000000 000000
000000
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db78df
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dc78e0
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007fff
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00ff7f
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de78e2
00ffff 00ffff
00ffff
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7f007f
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e078e4
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e278e6
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7fffff
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e378e7
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e578e9
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
e778eb e778eb
e778eb
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
e978ed e978ed
e978ed