StoneMasonKarel

/*
 * File: StoneMasonKarel.java
 * --------------------------
 * The StoneMasonKarel subclass as it appears here does nothing.
 * When you finish writing it, it should solve the "repair the quad"
 * problem from Assignment 1.  In addition to editing the program,
 * you should be sure to edit this comment so that it no longer
 * indicates that the program does nothing.
 */

import stanford.karel.*;

public class StoneMasonKarel extends SuperKarel {
        public void run (){
                columnBuilding () ;

        }

        private void columnBuilding () {
                if (facingEast ()) {
                        if (frontIsBlocked()) {
                                turnLeft () ;
                        } else {
                        turnLeft () ;
                        }
                        if (noBeepersPresent()) {
                                putBeeper () ;
                        }
                        while (beepersPresent()) {
                                move () ;
                                if (noBeepersPresent()) {
                                        putBeeper () ;
                                }
                        if (frontIsBlocked()) {
                                if (noBeepersPresent()) {
                                        putBeeper () ;
                                }
                                restart () ;
                        }
                        }
                }
        }

        private void restart () {
                turnAround () ;
                while (frontIsClear()) {
                        move () ;
                }
                if (frontIsBlocked()) {
                        turnLeft () ;
                        for (int i=0; i<4;i++)
                                move () ;
                }
                columnBuilding () ;
        }
}