20,3,253
#
in steps
000000 000000
000000
0000ff 0000ff
0000ff
00007f 00007f
00007f
007f00 007f00
007f00
007f7f 007f7f
007f7f
0500fe 0500fe
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00ff00
00ff7f 00ff7f
00ff7f
0a01fe 0a01fe
0a01fe
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7f007f
0f02fd 0f02fd
0f02fd
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7f7f00
7f7f7f 7f7f7f
7f7f7f
1403fd 1403fd
1403fd
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1903fc 1903fc
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1e04fc 1e04fc
1e04fc
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ff7fff ff7fff
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2305fb 2305fb
2305fb
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
2806fb 2806fb
2806fb