code: def rfibo(n):
      if n < 2:
          return n
      else:
          n_1 = rfibo(n - 1)
          n_2 = rfibo(n - 2)
          return n_1 + n_2
  
label_desc: Use image node_id 1 for calling a global function with example usage: rfibo(n) and returns: n, unknown