input papiers1;
beginfig(1);
  cadre((0,0),(17,14));
  draw papiermillimetre withcolor gris;
  origine((7,6));
  unites(1,1);
  draw axes;
  dotlabel.bot(btex $I$ etex,placepoint(1,0));
  dotlabel.lft(btex $J$ etex,placepoint(0,1));  
endfig;
end