The simplistic version:

cylinder
{ 0,y,1
  pigment
  { gradient y color_map
    { [0 rgb 1]
      [1 rgbf 1]
    }
  }
}

-- 
main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
*_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp -*/

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