docs: def getPointOnLine(x1, y1, x2, y2, n):
      """Returns the (x, y) tuple of the point that has progressed a proportion
      n along the line defined by the two x, y coordinates.
  
      Copied from pytweening module.
      """
      x = ((x2 - x1) * n) + x1
      y = ((y2 - y1) * n) + y1
      return (x, y)