Draw a rectangle box

helo, i can draw a rectnagle box at the top of my page as below, but how to draw one that starts at the bottom of the page (bottom left) and works upwards ?

I thought of doing the reverse of the below but it did not work, any ideas?

Thanks

myDocument.pages.item(0).rectangles.add({geometricBounds:["0", "0","14", "768"], strokeWeight: 1, strokeColor: "Black", fillColor: "Black"});