>I've used the example from help on how to generate random numbers. Now I need a random number between -1 and 1 (integer -1,0,1) and cannot figure out how to modify the example to give negative and positive numbers. Any tips?

If you are able to modify the code to give you random numbers between 0 and 2 (0, 1,2), then just subtract 1 from the result and you have random number between -1 and 1 (-1,0,1).
Otherwise post your current code and I (or someone else) will take a look at it.