well i need help again
its not that i can't do it its just that creating a trigger that creates 225 alternating scourge-observer is kinda long not to mention that even if the location is 15x15 i still cant produce all those units without moving the location around so i was wondering if there was a easier way out of this

Unfortunately, there isn't a way. Why do you need a 15x15 grid?

Yes there is. Create a 9x9 grid then keep repeating it centering in the spot where the last 9x9 grid left a location to move it 0-15 positions to the left, top, right or bottom. You can copy the 9x9 triggers 15 times to make the 15 9x9 grids work in the same trigger cycle.

Yeah, that's what this topic is all about, it's usually much more difficult to work 1 big massive grid, so you often want to split it into many smaller grids that just come off of eachother, it takes a bit of testing to figure out how to do it correctly, but once you do you'll start using it a lot.

Ignoring limited practicality, you could make a grid of larger units and then divide into smaller units where needed.

The idea being if you need only know a limited region and then get more precise.