by steps
000000 000000
000000
718dd1 718dd1
718dd1
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
718bd4 718bd4
718bd4
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
728ad7 728ad7
728ad7
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
7389da 7389da
7389da
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7f7f00
7f7f7f 7f7f7f
7f7f7f
7488dd 7488dd
7488dd
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7fff7f 7fff7f
7fff7f
7fffff 7fffff
7fffff
7587e0 7587e0
7587e0
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7686e3 7686e3
7686e3
ff7f00 ff7f00
ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
7785e6 7785e6
7785e6
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
7884ea 7884ea
7884ea