by steps
000000 000000
000000
998e20 998e20
998e20
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00007f
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0000ff
007f00 007f00
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007f7f 007f7f
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988d20
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007fff
00ff00 00ff00
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00ff7f
978c20 978c20
978c20
00ffff 00ffff
00ffff
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7f007f
978b20 978b20
978b20
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968b21 968b21
968b21
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7fffff
958a21 958a21
958a21
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958921 958921
958921
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
948821 948821
948821
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
948822 948822
948822