by steps
000000 000000
000000
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7f7f00
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f7f 007f7f
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728004 728004
728004
007fff 007fff
007fff
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00ff7f
668209 668209
668209
00ffff 00ffff
00ffff
7f0000 7f0000
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59840e 59840e
59840e
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4d8613 4d8613
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418817
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348a1c 348a1c
348a1c
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
288c21 288c21
288c21
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1c8e26 1c8e26
1c8e26