by steps
000000 000000
000000
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ff7f7f
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0000ff
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e18264
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c4864a c4864a
c4864a
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b5873d b5873d
b5873d
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a68930 a68930
a68930
ff7f00 ff7f00
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ff7fff ff7fff
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978b23 978b23
978b23
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
898d16 898d16
898d16