Keep fish from swimming off the edge

[paininthe*.*]

I have programmed a group of fish to make random turns within an aquarium world. But how do I stop the fish from swimming off the edge of the world? Thanks.

[Chelbellunl]

I am having sort of the same problem. I am using bumper cars and tring to contain them within an arena but everything i try that keep driving outside of it... Any replies or ideas from your problem?

[techproof]

I could only keep them off the screen by programming the camera to follow them. My issue is I can't get them to turn as a school in a random direction. I've gotten them to turn together but it's ether left or right. Any suggestions?