by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
728e72 728e72
728e72
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
669e66 669e66
669e66
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
5aad5a 5aad5a
5aad5a
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
4ebd4e 4ebd4e
4ebd4e
7f7fff 7f7fff
7f7fff
7fff00 7fff00
7fff00
7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
42cc41 42cc41
42cc41
ff0000 ff0000
ff0000
ff007f ff007f
ff007f
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ff00ff
36dc35 36dc35
36dc35
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
2aeb29 2aeb29
2aeb29
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1efb1d 1efb1d
1efb1d