by steps
000000 000000
000000
7fff7f 7fff7f
7fff7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
8def88 8def88
8def88
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
9bdf92 9bdf92
9bdf92
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
a9cf9c a9cf9c
a9cf9c
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
b7bfa6 b7bfa6
b7bfa6
7f7fff 7f7fff
7f7fff
7fff00 7fff00
7fff00
7fffff 7fffff
7fffff
c5afb0 c5afb0
c5afb0
ff0000 ff0000
ff0000
ff007f ff007f
ff007f
ff00ff ff00ff
ff00ff
d39fba d39fba
d39fba
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
e18fc4 e18fc4
e18fc4
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
ef7fce ef7fce
ef7fce