Two students are leaving their mark on an Ohio art and design college, sneaking into classrooms overnight to create intricate chalkboard art that’s capturing the school’s attention and creating plenty of buzz on social media.

The anonymous duo, known as “Dangerdust,” are seniors in the advertising and graphic design program at the Columbus College of Art and Design.

On their Instagram page, they describe their art as “the best form of vandalism.”

The chalkboards each contain a quote from a diverse list of characters, which includes Dr. Seuss, Banksy, Mark Twain and John Lennon.

 

Dangerdust share their creations on Twitter, Instagram and tumblr. Prints of the chalkboard art are also for sale on Etsy.

The artists say it takes up to 11 hours to create each masterpiece.