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/*
 * 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() {
    while(frontIsClear()) {
        ColRepair();
        nextCol();
        for(int i = 0; i < 4; i++) {
            move();
            if(frontIsBlocked()) {
                ColRepair();
                nextCol();
            }
        }
    }
}
private void ColRepair() {
    turnLeft();
    for(int i = 0; i < 4; i++) {
        while(beepersPresent() && frontIsClear()) {
            move();
            if(!beepersPresent()) {
                putBeeper();
            }
        }
        beeperCheck();
    }
}
private void beeperCheck() {
    if(noBeepersPresent()) {
        putBeeper();
        if(frontIsClear()) {
            move();
        }
    }
}
private void nextCol() {
    turnAround();
    while(frontIsClear()) {
        move();
    }
    turnLeft();
}
}