The latest work to debut in New Delhi’s Lodhi Art District—India’s first public art district—is never the same from one viewing to the next. That’s because it changes subtly throughout the day as the sun moves across the sky, the images disappearing as the evening wears on. Created by Indian street artist Daku (a pseudonym) earlier this year, letters mounted on a wall cast shadows like linguistic sundials, as Neatorama highlights. The words illuminated by the shadows all relate to time and perception.

To get the full effect, you should watch it in timelapse—or go visit throughout the day. However, due to the lack of shadows on the wall during the early summer, you'll have to wait until August to see it again.

[h/t Neatorama]

All images courtesy of St+art India // Facebook 

Know of something you think we should cover? Email us at tips@mentalfloss.com.