How do I add a static image-full browser window background

Hello,

How do I add a static image to fill a browser window background?

I would like it to be responsive.

Layer background has background image

Background image with origin point in the middle

Full screen scale outer

every tick

background image set position to

X: (ViewportBottom("background") - ViewportTop("background")) / 2

Y: (ViewportRight("background") - ViewportLeft("background")) / 2

background image set size

Width: ViewportRight("background") - ViewportLeft("background")

Height: ViewportBottom("background") - ViewportTop("background")

This should dymanically resize the background to fill your browser.

Great,THANKS!