Adding a background image to a specific entry - Solved!

[dj_aidatest]

Going through the tags, I found that there was a question on whether adding a background image to entries can be done. I have a similar question: is it possible to add it to a specific entry? For example, a sticky post, with text going over the picture instead of being written on it using a photo editing program?

Much obliged!

ETA: Solved thanks to wingweaver22 !