21,3,234
#
in steps
000000 000000
000000
1002ef 1002ef
1002ef
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
1102ed 1102ed
1102ed
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
1202ec 1202ec
1202ec
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
1402eb 1402eb
1402eb
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7f00ff
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7f7f00
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7f7f7f
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1503ea
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7fff7f 7fff7f
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7fffff 7fffff
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1603e9 1603e9
1603e9
ff0000 ff0000
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1803e8 1803e8
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ff7f7f
ff7fff ff7fff
ff7fff
1903e7 1903e7
1903e7
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1b04e6 1b04e6
1b04e6