import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class gem here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class gem extends Actor
{
    /**
     * Act - do whatever the gem wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        int variable = 20;
        if(Greenfoot.isKeyDown("space"))
        {
            while(!isTouching(border.class))
            {
                while(variable < 40)
                {
                    setLocation(getX(), getY()-6);
                    Greenfoot.delay(1);
                    variable += 1;
                }
            }
        }
    }    
}