pic6(colorgrid)

import geometry;

size(9cm,0);
defaultpen(fontsize(12pt));
dotfactor = 4;

for(int i=0; i<=10; ++i){
  for(int j=0; j<=10; ++j)
filldraw(shift(j,i)*unitsquare, rgb (i/10,j/10,0),black+0.1pt);
}