text: import oellipse5_tst as oe
  import math
  
  Nsteps = 500
  ystart = -0.2
  ystop = 2.2
  
  ystep = (ystop-ystart)/(Nsteps-1)
  fiangle = 55
  
  def radian(deg):
      return (float(deg)/360)*2*math.pi
  
  for n in xrange(0,Nsteps):
      yc = ystart + n*ystep
      fname = "frames/oet"+ ('%05d' % n)+".png"
      oe.main(ycoord=yc, filename=fname, theta=70, fi=radian(fiangle))
      #fiangle = fiangle + 2
  