by steps
000000 000000
000000
6c877a 6c877a
6c877a
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
007f7f
6f897a 6f897a
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007fff 007fff
007fff
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00ff7f 00ff7f
00ff7f
728c7a 728c7a
728c7a
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f
768f7a 768f7a
768f7a
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79927a
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7c947a 7c947a
7c947a
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80977a 80977a
80977a
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ff7f7f
ff7fff ff7fff
ff7fff
839a7a 839a7a
839a7a
ffff00 ffff00
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ffff7f
ffffff ffffff
ffffff
879d7a 879d7a
879d7a