Help with movement

Here is my code I am just trying to figure out how to get the object to start moving up in the first place and have the if statements still workimport greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo) /** * Write a description of class Zone here. * * @author (your name) * @version (a version number or a date) */ public class Zone extends Actor { private int uSpeed = -8; private int dSpeed = 8; private boolean atEdge; /** * Act - do whatever the Zone wants to do. This method is called whenever * the 'Act' or 'Run' button gets pressed in the environment. */ public void act() { move(); atWorldEdge(); } private void move() { if(getY() <= 300 && atWorldEdge()) { turn(180); setLocation ( getX(), getY() + dSpeed); } if(atWorldEdge() && getY() > 300) { turn(180); setLocation ( getX(), getY() + uSpeed); } } public boolean atWorldEdge() { if(getX() < 1 || getX() > getWorld().getWidth() - 1) return true; if(getY() < 1 || getY() > getWorld().getHeight() - 1) return true; else return false; } }