code: def test_para_equal_perp():
      x = np.array([0, 1, 2, 1, 0, -1, 0, 1] + [1] * 128)
      y = np.array([1, 1, 2, 1, 0, -1, 0, 0] + [0] * 128)
  
      fig, ax = plt.subplots()
      ax.plot(x + 1, y + 1)
      ax.plot(x + 1, y + 1, "ro")
  
imports: import base64
  import io
  import numpy
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  import pytest
  from matplotlib.testing.decorators import check_figures_equal, image_comparison, remove_ticks_and_titles
  import matplotlib.pyplot
  from matplotlib import patches, transforms
  from matplotlib.path import Path
label_desc: Use image node_id 17 for calling a global function with example usage: test_para_equal_perp() without return types