Randomising position of an object

[ptjt255]

Hi

I wonder if someone can help me. I have created a 3x3 array of cubes using the copy function, I have set each cube to rotate. I now want each cube to randomly loom (i.e. come towards me) so that only 1 cube is looming at a time. Then I want to record reaction times to a key press, but if a key isn't pressed want to wait x seconds and then show the next random cube looming.

I suppose the easiest way of doing this would be to have one cube that looms and randomly shuffle it's location, but I'm sure how to do this.

Any help would be much appreciated.

Many thanks.