A post shared by Art By Amanda (@artbyamanda33) on May 16, 2018 at 1:14pm PDT

Before the May 22 unveiling of the light installation on the tip of Salesforce Tower—a permanent multi-million dollar LED video piece by Jim Campbell—check out a preview of what’s in store.

Over the last couple of weeks, the installation’s practice run has enticed, delighted, and perplexed many wondering what on earth is happening on top of the city’s tallest high-rise. So far the scene shows a montage of joggers, pedestrians, and clouds.

Campbells’s work can be seen on the top six floors of the structure covered in roughly 11,000 LED lights. According to SFGate, Campbell placed cameras around the city “that will take photos around the city during the day and these will be displayed on the building’s crown at night.”

The work is reportedly visible from 20 miles away.

To whet your appetite, here are some choice Instagram shots showing what’s to come.

A post shared by Harlan Crystal (@harlancrystal) on May 15, 2018 at 11:25pm PDT

A post shared by Renee Monte (@rmonte33) on May 15, 2018 at 9:20pm PDT

A post shared by Igor Tello (@igorresss) on May 15, 2018 at 8:47pm PDT

Neat.

Campbell, who lives and works in San Francisco, has electronic artwork featured in permanent collections in the Museum of Modern Art (MoMA), the Smithsonian American Art Museum, and the San Francisco Museum of Modern Art (SFMOMA).

His piece isn’t the only whimsical design element for the tower. A gondola lift, found at the corner of Mission and Fremont Streets, is also in the works.