20,28,123
#
in steps
000000 000000
000000
111d7d 111d7d
111d7d
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
111c7c 111c7c
111c7c
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
121c7c 121c7c
121c7c
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f 7f007f
7f007f
131c7b 131c7b
131c7b
7f00ff 7f00ff
7f00ff
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7f7f7f 7f7f7f
7f7f7f
141c7b 141c7b
141c7b
7f7fff 7f7fff
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7fff7f 7fff7f
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7fffff 7fffff
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151c7a 151c7a
151c7a
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161c7a 161c7a
161c7a
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ff7f7f
ff7fff ff7fff
ff7fff
171c79 171c79
171c79
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
181c79 181c79
181c79