code: def make_lines_texture(num_lines=10, resolution=50):
      
      x, y = np.meshgrid(
          np.hstack([np.linspace(0, 1, resolution), np.nan]),
          np.linspace(0, 1, num_lines),
      )
      
      y[np.isnan(x)] = np.nan
      return x.flatten(), y.flatten()
docs: Makes a texture consisting of a given number of horizontal lines.
  
      Args:
          num_lines (int): the number of lines to draw
          resolution (int): the number of midpoints on each line
  
      Returns:
          A texture.