While visually interesting, these graphics serve a civic purpose.
Each square in the grid belongs to a specific politic party and each party is identified by a unique symbol. While posters and other printed information may be displayed here, its most basic purpose is to display these symbols as a visual voter’s guide. These symbols enable illiterate voters to identify and cast ballots for the party of their choice. It seems like a necessary accommodation in a country with a literacy rate around 55% (and still lower among women and in rural areas).
I photographed this wall in Fes, but similar walls can be seen in cities and villages across the country.