by steps
000000 000000
000000
7f007f 7f007f
7f007f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
7d147f 7d147f
7d147f
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
7b287f 7b287f
7b287f
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
793c7f 793c7f
793c7f
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
7f7f7f 7f7f7f
7f7f7f
78507f 78507f
78507f
7f7fff 7f7fff
7f7fff
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7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
76647f 76647f
76647f
ff0000 ff0000
ff0000
ff007f ff007f
ff007f
ff00ff ff00ff
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74787f 74787f
74787f
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
728c7f 728c7f
728c7f
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
71a17f 71a17f
71a17f