Architectural Tetris! Copy below from Flavorwire:

“Designer-in-training Sergej Hein animated this entertaining parody of Soviet Bloc architecture, filtered through the early ’90s pop culture touchstone Tetris. Hein, who grew up in Riga and later East Berlin, explains, ‘They used to build cheap housing for workers…. These “blocks” were so similar that in Soviet times, you could easily wake up at a friend’s place in another city and still feel like you are in your flat. Even the furniture was the same.’”