// Use this for initialization void Start() { Rocks newRocks = new Rocks(); newRocks.startPos = start; newRocks.endPos = end; newRocks.Prefab = Rock; float ys = newRocks.startPos.y; float xs = newRocks.startPos.x; float ye = newRocks.endPos.y; float xe = newRocks.endPos.x; for (float i = ys; i <= ye; i++) { for (float a = xs; a <= xe; a++) { newRocks.place(a, i); } } }