If you are just wanting it to pick a between a couple choices you can use:
choose(a, b)
This will select one of the two..
So could also be numbers like;
choose(1, 2)
for example.
You can add as many choices as you want.
choose(a, b, c, d, 2, 4, 15, pizza)
The 'random' function is used for picking a random number between two numbers..
You should use choose instead i think/