This one isn’t up against any wall. It’s in the middle of a wide open field where some children have built a clubhouse nearby out of 4 aluminium hoops and a big piece of lightweight plastic drop cloth. The clubhouse is falling down and the ladder serves no purpose. Neither tool, nor toy, nor even metaphor.
Maybe it was important to someone once. Now it just stands quietly in the tall grass as the harsh sun makes it bright against its dark green background.
It’s probably lonely and I think it likes to have its picture taken.