Drawnomic.

Covernomics has developed our own unique reactive drawing machine, based on a variation of the hanging-pen plotter.

Drawnomic is capable of working in two distinct modes of operation: passive and reactive. In passive mode it simply recreates an existing image.

When in reactive mode Drawnomic can accept instruction and input directly, or indirectly from anywhere in the world via RSS and other data feeds. These instructions and inputs are then combined and interpreted by our unique software, the Drawnomic machine than takes a pen (a physical human tool) and uses it to draw the result.

Uses:
Adafruit motorshield - using 4x L293D chips stacked in pairs to handle twice the power, added heat sinks.
Adafruit micro sd breakout with a 4GB micro SD
2x stepper motors