1. public int cv = 256;

   color _fr(color col){

   color retval = col%cv;

   return retval;

   }

   color _fg(color col){

   color retval = int(col/256)%cv;

   return retval;

   }

   color _fb(color col){

   color retval = int(col/65536)%cv;

   return retval;

   }

   color _fr3(color col){

   color retval = col%cv;

   return retval;

   }

   color _fg3(color col){

   color retval = col/256%cv;

   return retval;

   }

   color _fb3(color col){

   color retval = col/65536%cv;

   return retval;

   }

   color _fr4(color col){

   color retval = (col*2)%cv;

   return retval;

   }

   color _fg4(color col){

   color retval = col/(256*128)%cv;

   return retval;

   }

   color _fb4(color col){

   color retval = col/(65536)%cv;

   return retval;

   }

   color _fr2(color col){

   color retval = col >> 16 & 0xff;

   return retval;

   }

   color _fg2(color col){

   color retval =col >> 8 & 0xff;

   return retval;

   }

   color _fb2(color col){

   color retval = col  & 0xff;

   return retval;

   }

    

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