code: def update_output(set_progress, n_clicks):
      for i in range(4):
          set_progress(f"Progress {i}/4")
          time.sleep(1)
      return f"Clicked '{n_clicks}'"
  
label_desc: Use image node_id 1 for calling a global function with example usage: update_output(set_progress, n_clicks) and returns: str, n_clicks, str