21,0,249
#
in steps
000000 000000
000000
1000fa 1000fa
1000fa
00007f 00007f
00007f
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0000ff
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007f00
007f7f 007f7f
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1100f9
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00ff7f
1200f9 1200f9
1200f9
00ffff 00ffff
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7f007f
1300f9 1300f9
1300f9
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7f00ff
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7f7f00
7f7f7f 7f7f7f
7f7f7f
1500f9 1500f9
1500f9
7f7fff 7f7fff
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7fffff 7fffff
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1600f8 1600f8
1600f8
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ff7fff
1800f8 1800f8
1800f8
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ffff7f
ffffff ffffff
ffffff
1a00f8 1a00f8
1a00f8