increasing scale based on mouse position

I'm making a map editor for my game, and i'm trying to scale the selected block based on mouse location... I'll give you guys an example:

Here's a selected block:

When I move my mouse to the left it makes:

So that's basically it !

I tryed to take the mouse direction like so:

 int MouseDir = 0;
 
 if (mousepos.x <= 700)
             {
                 MDir = 1;
             }
             
             if (mousepos.x >= 700)
             {
                 MDir = -1;
             }
             
             if (mousepos.y <= 200)
             {
                 MDir = 2;
             }
             
             if (mousepos.y >= 200)
             {
                 MDir = -2;
             }

Then based on that I made "+1" to the X scale if the mouse coordinates have changed and if the MouseDirection is, for example, "1".

I'm not really good for explanations sorry about that, but thanks for give a try!