How to spawn objects randomly up the screen?

I’ve made 2 objects, but I’m trying to make objects spawn randomly up the screen, but it would only show 2 of the same objects going up and no more would show up. My game screen is 640x960 by the way.

there are many thread in this topic. you can use the search fuction of the forum.

You can use a scene timer and a random in range expression.