code: def load_next():
      global last_loaded
      try:
          load_example(last_loaded + 1)
      except IndexError:
          pass
  
file_path: vispy/examples/basics/scene/modular_shaders/sandbox.py
imports: from PyQt5 import QtCore
  from PyQt5.QtWidgets import *
  import sys
  import traceback
  from editor import Editor, HAVE_QSCI
label_desc: Use image node_id 2 for calling a global function with example usage: load_next() without return types