A complex script question

[heerokoseru1]

So I've messed with quickmacros for a good month or so now, I've got down the basics of creating, and writing a function. I'm confused on something though, I'm trying to make a type of macro that when the mouse is set at a certain part of the screen "the center" it presses J. I've tried to make this, but I've failed I'm not sure what I'm doing wrong, or if this macro can even be made. The coordinates for the center path are "513, 385" basically when the mouse gets to that coordinate i just want it to press/spam the letter J. Is this possible?

I'm trying to make some simple commands for a screen dot I made, so I can go through the screens I made easily. Thank you for all the help I really like this program