Day 67: Oh look it's green

Behind this post is a little story which is from the beginning of our stay in Liverpool.
The first time we went shopping, we were waiting at a red light, we looked left and right, no cars, but two policemen walking towards us.
We thought lets just wait because there are policemen walking.
When they got on the crossing where we stood, they looked left, right and just crossed while the red was light.

After a few days we noticed red lights just mean: look out for cars, but you can cross.
It's of course not allowed, but policemen don't do anything.

So every time we have a red light we say: oh look it's green, then one of us always responds with, a frog.