func_code: def merge_lists(l1, l2):
      l3 = []
      i = 0
      while i < len(l1):
          l3 = l3.split(',')
          l3.append(l1[i])
          i = i + 1
      i = 0
      while i < len(l2):
          l3.append(l2[i])
          i = i + 1
      return l3[::2]