new_contents: import cv2
  
  cam = cv2.VideoCapture(0)
  running = True
  
  while running:
      running, frame = cam.read()
      if running:
          # draw rectangle
          cv2.rectangle(frame,(100, 100), (200, 200), (255,0,0), 2)
          # write text
          font = cv2.FONT_HERSHEY_SIMPLEX
          cv2.putText(frame,'Press Escape to exit...',(10,50), font, 1,(255,255,255),2)
          cv2.imshow('frame', frame)
          if cv2.waitKey(1) & 0XFF == 27: #Escape key pressed
              running = False
      else:
          print '[Error] reading video feed.'
  
  cam.release()
  cv2.destroyAllWindows()
  
subject: Add HelloWorld.py to test correct setup