Gijs van Bon is quite proud of his poetry-writing robot. Named Skryf, this rolling bot evolved from a basic CNC concept to the poetry-writing machine you see in the video below.
As you can see in the video above from Dizeen.com, there is a reservoir for finely-sifted sand. The "head" can travel on one axis while the bot itself moves on another, allowing for 2 axis of freedom to create letters of up to 50 cm tall. An onboard laptop acts as an interface, allowing Gijs van Bon to type out the poetry he wishes to deposit. Once he is done, the machine begins dumping sand and progressing roughly 160 meters in four hours.
The sand is left to dissipate however it will. The company states that sometimes people walk on it, and other times the wind simply blows it away. The temporary nature of it is not only responsible, but also seems to add some ethereal feeling to the art display.
There isn't any technical information available about the construction of Skryf, but if you'd like to see more pictures or follow along on a map as it travels around the world celebrating local poets, you can do so on the official site of Skryf.
— Caleb Kraft, Chief Community Editor, EE Times