new_contents: #!/usr/bin/env python
  
  # Open Pixel Control client: Test crosstalk between LED strips;
  # send each strip a different pattern, use a lot of low-brightness
  # pixels so that glitches show up clearly.
  
  import opc, time
  
  client = opc.Client('localhost:7890')
  
  while True:
  	for strip in range(8):
  		pixels = [ (40,40,40) ] * 512
  		for i in range(32):
  			pixels[strip * 64 + i * 2] = (100,100,100)
  
  		client.put_pixels(pixels)
  		time.sleep(0.5)
  
subject: Add a tool for provoking crosstalk glitches between channels