Beginner: For Loop freezing unity

Well, just as it says at the top. I have an empty game object and a script attached to it. The script should loop through some numbers representing coordinates for future objects but as soon as I hit play in unity, the whole program freezes. The function is called from inside Start() and I tried putting a print command inside to verify that it gets to that point but the program freezes completely so nothing is printed to the console anyway. I have to kill it from within task manager every time.

 function Start () {
     PlaceStars();
 }
 
 function PlaceStars () {
     objectID = 1;
     
     for (zCoordinate = universeRadius; zCoordinate > -universeRadius * 2; zCoordinate++) {
         for (xCoordinate = universeRadius; xCoordinate > -universeRadius * 2; xCoordinate++) {
             //NewStar(xCoordinate, zCoordinate);
             print(xCoordinate + ", " + zCoordinate);
         }
     }
 }

The variables are in the right place, of the right type and instantiated already. Ask if you need more details but I can't think of anything else right now. Thanks for any help in advance.