<script src="http://spelprogrammering.nu/simple.js">

function start()
{
  a  = 1;
  b  = 1;
  m  = 4;
  n1 = 2;
  n2 = 4;
  n3 = 13;

  v = 0;
}

function update()
{
  r = pow((abs(pow(cos(m * v / 4) / a, n2)) + 
           abs(pow(sin(m * v / 4) / b, n3))), (-1 / n1));
  math.polarPoint(v, r);
  v += 0.001;
}

</script>