If you’ve seen the Warhol Bridge since volunteers “Knit the Bridge,” you know how much work went into covering it.

Well, now you can watch a time lapse video showing volunteers painstakingly adding the knit pieces.

Find out more about “Knit the Bridge”: Warhol Bridge “Yarn Bombing” Project Underway

More than 600 blankets were made by 1,800 volunteers to cover the Warhol Bridge.

Of all the bridges in the City of Bridges, the group chose to “yarn bomb” the Andy Warhol Bridge.

The bridge will remain covered in yarn until September.

To see the time lapse, check out the video here: