code: def get_my_image():
      """A color image with red in the upper left, green in the lower left and blue in the upper right"""
      img = numpy.zeros((50, 50, 3))
      img[0:25, 0:25, 0] = 1
      img[0:25, 25:50, 1] = 1
      img[25:50, 0:25, 2] = 1
      return img
  
imports: import numpy
  import pytest
  import six.moves
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler.modules.colortogray
  import cellprofiler_core.modules.injectimage
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.workspace
  import tests.frontend.modules
label_desc: Use image node_id 1 for calling a global function with example usage: get_my_image() and returns: img