Hi - was wondering if anyone can help. There's a dystopian short story I read a long time ago and which I can only partially remember. It feels like a Bradbury story but I can't be sure. All I know is this:

- It involves an authoritarian society
- At the end, the protagonist defaces a wall in protest; however the wall instantly cleans itself, rendering his act of rebellion pointless
- I think it may involve a moving sidewalk somewhere.

Not a lot to go on I know - anyone recognise this as a Bradbury (or at all)?

Any help very gratefully received...

I am fairly sure this is not a Ray Bradbury story, and I've read all the stories in his generally available story collections.

Sounds like the author may have been influenced by Bradbury or had similar ideas.