text: import numpy as np
  import cv2
  
  a = np.zeros((256,256), dtype=np.uint8)
  for u in np.exp(np.linspace(0,1j*2*np.pi,25)):
      cv2.line(a, (100, 100), (int(100+100*u.real+.5), int(100+100*u.imag+.5)), 255, 2)
  cv2.imwrite('burst.png', a)
  cv2.waitKey(0)
  cv2.destroyAllWindows()
  # PID appears to hang: https://stackoverflow.com/questions/24682797/python-opencv-drawing-line-width#24687564 
  