ActionScript 3.0 :: Moving Object Relative To Another Movement

I have made a class file player and another class file landscape. The player class file has methods that allow the player to move. Where would I put code to make the landscape move with the player? Would the code go into the player class file or the document class file? I don't know how I could link the landscape movement with the player movement

player.as class file
Code:
//the package
package actionscript{
import flash.display.*;
import flash.events.*;
import flash.media.*;
[Code] .....