Scratch

I've got the script for pointing towards a set of co-ordinates. But something strange is happening:

when gf clicked
set [delta x v] to ((item [1 v] of [xlocations v]) - (x position))
set [delta y v] to ((item [1 v] of [ylocations v]) - (y position))
if <(delta y) = (0)>
if <(delta x) = (0)>
set [ideal direction v] to (-90)
else
set [ideal direction v] to (90)
end
else
if <(delta y) < (0)>
set [ideal direction v] to (180 + ([atan v] of ((delta x) / (delta y))))
else
set [ideal direction v] to ([atan v] of ((delta x) / (delta y)))
end

I have a turning script after that.
When the target location is -100 -100 the ideal direction is 225, an unreachable target so it just keeps rotating