code: def move_plane(event):
      z_pos = plane.plane_position[0]
      if z_pos < 32:
          plane.plane_position = plane.plane_position + [1, 0, 0]
      elif 32 < z_pos <= 220:
          plane.plane_position = plane.plane_position - [1, 0, 0]
      else:
          plane.plane_position = (220, 64, 64)
  
file_path: vispy/examples/scene/volume_plane.py
imports: import sys
  import numpy
  from vispy import app, scene, io
  from vispy.visuals.transforms import STTransform
label_desc: Use image node_id 4 for calling a global function with example usage: move_plane(event) without return types