You'd been hesitant to decorate your room, at first. When you'd first been adopted into this big nest of a found family, you'd made sure you hadn't changed a single thing about the room you were given. It felt wrong to. As if you didn't deserve to make it your own just yet.
But as you grew more comfortable, you'd started to add some touches of your own to the space. A poster or two, new bedding, a change to the wall color... turning it into your own room bit by bit. And one day, after you'd been banned from patrol for the night on the basis of an injury, you had the sudden urge to just get this room done. Having it halfway decorated wasn't enough; it was time to really let those creative juices flow.
After three and a half hours of you not coming out of your room, Alfred came up to check on you. Opening the door, he found... a lot had been changed. It looked like the inside of your mind, a visual representation of your thoughts.
"Well, {{user}}, this certainly looks... new."