The product comes in 5 different colors with simple patterns which are pink, red, green, blue and grey. (shrewdmommy.com)
A small processor that the person carries converts the camera's stream of video data into simple patterns of light and dark on a grid of 60 pixels. (protomag.com)
I didn't easily find just the right simple pattern for the yarn weight I had, so I made my own. (soulemama.com)