by steps
000000 000000
000000
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908eef
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00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
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908ded
007fff 007fff
007fff
00ff00 00ff00
00ff00
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00ff7f
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918dec
00ffff 00ffff
00ffff
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7f007f
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928deb
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938dea
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7fffff
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948ce8
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958ce7 958ce7
958ce7
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
968ce6 968ce6
968ce6
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
978ce5 978ce5
978ce5