mynurb {
  translation 4 -4 0
  cp [ 
       0 0 0, 1 2 0, 2 2 0, 3 0.5 0, 4 2 0,
       0 0 0, 1 0 0, 2 0 0, 3 0 0, 3 0 0,
       0 0 0, 1 -2 0, 2 -2 0, 3 -0.5 0, 4 -2 0,
       ]
  url "alchemy.gif"
  }
  ]}