code: def audio_loop(clip, n_loops=None, duration=None):
      """Loops over an audio clip.
  
      Returns an audio clip that plays the given clip either
      `n_loops` times, or during `duration` seconds.
  
      Examples
      --------
  
      >>> from moviepy import *
      >>> videoclip = VideoFileClip('myvideo.mp4')
      >>> music = AudioFileClip('music.ogg')
      >>> audio = afx.audio_loop( music, duration=videoclip.duration)
      >>> videoclip.with_audio(audio)
  
      """
      if duration is not None:
          n_loops = int(duration / clip.duration) + 1
          return concatenate_audioclips(n_loops * [clip]).with_duration(
              duration
          )
  
      return concatenate_audioclips(n_loops * [clip])
  
label_desc: Use image node_id 1 for calling a global function with example usage: audio_loop(clip, n_loops, duration) and returns: concatenate_audioclips, concatenate_audioclips