San Francisco’s Bay Bridge is the dollar store version of the famed Golden Gate Bridge: it’s a bridge that transports cars, sure, but it’s less attractive and prone to breaking at inopportune times, like in the middle of earthquakes and occasionally just for no reason. Before the Bay Bridge closes down this summer for final touches on the new, safer eastern span, the bridge is getting gussied up by artist Leo Villareal, who is individually programming 25,000 white LED lights to generate an endless series of sparkling patterns across the structure.

More: San Francisco’s Bay Bridge Is About to Become the World’s Largest Light Sculpture