A German programmer with time on his hands has taken up code-farming to send a greeting to the world. Cutting his code into a back-compatible wheat field, Ben Hopfeng-Aertner produced this machine-readable patch that will output the words "Hello World!"

To create his greeting, Ben used Semacode, a type of visual code that contains "machine readable information" that can be used to graphically encode web-links. Since the code is visual, Ben was able to take a picture of his 160 square metre programming artwork from the air and have a machine read the code to output the words "Hello, World!"