This image is a PIET script. If you feed it to a PIET-compiler, it will give you the text-message "Guten Rutsch"
"Guten Rutsch" is traditional German colloquial for wishing a good transition into the new year or "good slide!".
For readability each pixel is magnified to take 4*4 pixels.

A piet compiler can be found here: piet-editor.github.io/ (use codel-size 4)