by steps
000000 000000
000000
719281 719281
719281
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
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719180
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
729080 729080
729080
00ffff 00ffff
00ffff
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7f007f 7f007f
7f007f
728f80 728f80
728f80
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738e80
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748d80
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748c80 748c80
748c80
ff7f00 ff7f00
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ff7f7f ff7f7f
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ff7fff ff7fff
ff7fff
758b80 758b80
758b80
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
768a80 768a80
768a80