I think it is supposed to be the jump path for the student at the rear (there is one in the front too). It looks to me like the front one got colored correctly and the rear one got colored Louie.
Visited it twice while I was in the Army. Once in summer and the other in winter (we were testing equipment in various climates). On the winter trip Marines were there for cold weather training. They got their money’s worth.
The foot bone’s connected to the ankle bone . . .