text: import matplotlib.pyplot as plt
  
  from newSim import computeForValues
  
  plt.figure()
  plt.xlabel("Density")
  plt.ylabel("Flow rate per length")
  D, F = computeForValues(100, 5)
  plt.plot(D, F)
  D, F = computeForValues(100, 10)
  plt.plot(D, F)
  D, F = computeForValues(100, 50)
  plt.plot(D, F)
  D, F = computeForValues(100, 250)
  plt.plot(D, F)
  D, F = computeForValues(100, 500)
  plt.plot(D, F)
  D, F = computeForValues(100, 1000)
  plt.plot(D, F)
  plt.figlegend(('L = 5', 'L = 10', 'L = 50', 'L = 250', 'L = 500', 'L = 5000'))
  plt.savefig("./plots/4_2/density.png", dpi=160)
  