by steps
000000 000000
000000
df7f01 df7f01
df7f01
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
007f7f
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d37f01
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007fff
00ff00 00ff00
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c77f02 c77f02
c77f02
00ffff 00ffff
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7f007f 7f007f
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bb7f02 bb7f02
bb7f02
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7f7f7f
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7fff7f
7fffff 7fffff
7fffff
a38004 a38004
a38004
ff0000 ff0000
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ff00ff
978004 978004
978004
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
8b8005 8b8005
8b8005
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
7f8106 7f8106
7f8106