Arduino Hose Dot Matrix Display

This was a demo project for the maker faire in Hannover 2016. The project was inspired by the work of the artist Julius Popp. We are using a transparent hose, 2 peristaltic pumps and an Arduino Uno with motor shield to build a simple display.
The pumps pressing a pattern of water and red paraffin oil in the hose. In the end a text will be visible.

You will find more information on our website.

Wow, this is incredibly cool!
You may want to put the hoses a little closer together (as they're a little difficult to read) but otherwise, super clever and neat! I'm sharing this with some other engineers at work. Great job!

Great looking project.

How do you separate the red and clear liquids?