The developers behind a new tower rising in downtown Warsaw, Poland, have added a sunny surprise to the side of the building, aiming to brighten the moods of citizens during dark and cold months of winter construction.

A temporary installation, set to stay in place until the floors are occupied, was made to “brighten up the lives of people during this depressing winter time, when the days are short and you miss the sun.” It was intentionally lit on Blue Monday, thought to be the most depressing day of the year.

The 42-story Q22 tower is a neomodern office building developed by Polish firm Echo Investment and designed by APA Kury?owicz & Associates with collaboration from Buro Happold Polska.

Intentionally or otherwise, the entire project evokes images of retro gaming graphics and vintage cyberpunk films like Bladerunner, in a way (perhaps depressingly) reminding residents of just how much winter they still have lying in wait.