Shadow People

So, I have a new poem! I actually wrote this really quickly, but I'm kind of proud of it. Anyway, though, what do you guys think? Do the stanzas work? Is the repitition okay? Thanks <3

***

we’re the shadow people
when you
and everyone else
aren’t watching.

we run through parking lots
and play tag with cars
trying to back up.

nothing can see us.

we lie on dirty sidewalks
and watch feet pass through
the foggy grey of our skin.

no one can hurt us.

in winter we jump
naked into crystallized ponds,
swim in the deep black frost.

nothing can make us.

nothing can know us.