code: def l_system(axiom, transformations, iterations=1, angle=45, resolution=1):
      
      turtle_program = transform_multiple(axiom, transformations, iterations)
      return turtle_to_texture(turtle_program, angle, resolution=resolution)
docs: Generates a texture by running transformations on a turtle program.
  
      First, the given transformations are applied to the axiom. This is
      repeated `iterations` times. Then, the output is run as a turtle
      program to get a texture, which is returned.
  
      For more background see: https://en.wikipedia.org/wiki/L-system
  
      Args:
          axiom (str): the axiom of the Lindenmeyer system (a string)
          transformations (dict): a dictionary mapping each char to the string that is
              substituted for it when the rule is applied
          iterations (int): the number of times to apply the transformations
          angle (float): the angle to use for turns when interpreting the string
              as a turtle graphics program
          resolution (int): the number of midpoints to create in each turtle step
  
      Returns:
          A texture