Thing day 1

I was walking back from my last class of the day when I saw this. I have no idea what it is, so if anyone can help me, that would be great.

As I was ready to go home, I spotted it on the door to my sixth form collage and decided that I needed to capture this.

The camera was set to auto with super macro, as I was in a rush and did not have time to fiddle with camera settings. I think it looks better larger.