THANK YOU VERY MUCH Iglarion - got the mouse!( actually a rat, but that's just fine).
I have tried to make it walk along a path, but no luck - can not get the code right - do you know of a piece of code which would work - IN C-SCRIPT.
Apologies for being a nuisance, but I am stuck.
The idea is for the rat to be in a box (with a hole in it) come out of the hole when 'triggered', follow a path, and go back into the box through another hole.
Kind regards, David