21,15,10
#
in steps
000000 000000
000000
19140a 19140a
19140a
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
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18120a
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00ff7f
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17110a
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16100a 16100a
16100a
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150f0a
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140e0a 140e0a
140e0a
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130d0a 130d0a
130d0a
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ff7fff
120c0a 120c0a
120c0a
ffff00 ffff00
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ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
110b0b 110b0b
110b0b