Push-screen scrolling

I'm trying to figure out how to make push-screen scrolling in MMF2. Basically, push screen scrolling is: when the player gets close enough to the edge of the screen, the camera slowly moves over until it's centered on the player.

Any suggestions on how to make this work?

You could create an invisible camera object that chases the player when the player puts the right amount of distance.

X(Player)-X(Camera)>400:
-->Set X(Camera) to X(Camera)+1

Then set the screen to center on the camera object, not the player.