diatom

  package 'circle'
    density 1
    insert circle
      ce = 50,0
      r = 40
      ri = 30
    endinsert
  endpackage

  package 'box'
    density 2
    insert box
      p1 = 45,35
      p2 = 55,90
    endinsert
  endpackage

enddiatom
