An art installation along Philadelphia’s Northeast Amtrak corridor is adding some color to the travel experience for 34,000 daily riders. Berlin-based artist Katharina Grosse has been commissioned by the city’s Mural Arts Program to transform seven sites alongside the tracks with vibrant (and environmentally friendly) coats of paint: Orange and white streak across a warehouse, green and white do the same on an abandoned brick structure, and hot pink cover brush and boulders.

The installation, titled psychylustro, began unveiling itself in late April and will “unfold in a series of seven passages—from vast, dramatic warehouse walls to mall buildings and stretches of green spaces—meant to be framed through the windows of the moving train, creating a real-time landscape painting that explores shifting scale, perspective and the passage of time.” The Mural Arts Program has committed to maintain the work in “world-premier conditions” for its first six months. After that, the installation is intended to age, weather, and disappear altogether.