15,21,83
#
in steps
000000 000000
000000
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f00
007f7f 007f7f
007f7f
030514 030514
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00ff7f
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070a29
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0b103e
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131a68 131a68
131a68
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ff7fff ff7fff
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1b2592 1b2592
1b2592
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1f2ba7 1f2ba7
1f2ba7