by steps
000000 000000
000000
708c1f 708c1f
708c1f
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
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708c1e 708c1e
708c1e
007fff 007fff
007fff
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00ff7f
718c1e 718c1e
718c1e
00ffff 00ffff
00ffff
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728c1d 728c1d
728c1d
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738c1d
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738c1c
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748c1c
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ff7f00
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ff7f7f
ff7fff ff7fff
ff7fff
758c1b 758c1b
758c1b
ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
768d1b 768d1b
768d1b