Shuttle runs with Karel

package Activity1;
import kareltherobot.*;

public class Activity1Main extends UrRobot{

    public Activity1Main (int s, int a, Direction d, int b){
        super(s, a, d, b);
    }

    public static void main(String[] args) {

        World.readWorld("Lesson3World1.kwld"); //reading and creating world
        World.setVisible();
        World.setDelay(20);

        Activity1Main arthur = new Activity1Main(4,3, North, 0);

        for (int out = 0; out < 3; out++){ //there are three columns, so it runs three times

            for (int in = 0; in < 5; in++){ //the robot does five shuttle runs
                arthur.runShuttle();
            }

            if (out != 2){ //the robot moves to the next column the first two times
                arthur.turnAround();
                arthur.turnLeft();
                arthur.move();
                arthur.turnLeft();
            }
        }
    }

    /**
     * the robot runs a single shuttle run
     * @param - none
     * @return - void
     */
    public void runShuttle(){
        runToOtherSide();
        pickBeeper();
        turnAround();
        runToOtherSide();
        putBeeper();
        turnAround();
    }

    /**
     * goes to to other side
     * @param - none
     * @return - void
     */
    public void runToOtherSide(){
        move();
        move();
        move();
    }

    /**
     * allows the robot to instantly turn around
     * @param - none
     * @return - void
     */
    public void turnAround(){
        int delay = World.delay();
        World.setDelay(0); //by changing the delay, the robot turns left instantaneously
        turnLeft();
        World.setDelay(delay);
        turnLeft();
    }

}