15,18,251
#
in steps
000000 000000
000000
0000ff 0000ff
0000ff
00007f 00007f
00007f
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007f00
007f7f 007f7f
007f7f
0304fe 0304fe
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00ff7f
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0709fd
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7f007f
0b0dfc 0b0dfc
0b0dfc
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7f7f00
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0f12fb
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1316fa 1316fa
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171bf9
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ff7fff ff7fff
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1b1ff8 1b1ff8
1b1ff8
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1f24f8 1f24f8
1f24f8