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    import stanford.karel.*;
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    public class StoneMasonKarel extends SuperKarel {
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    public void run() {
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    //putting beepers into the broken columns in the world
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    while (frontIsClear()) {
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    topOfColumn();
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    putBeeperInColumn();
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    nextColumn();
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    }
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    topOfColumn();
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    putBeeperInColumn();
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    }
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    public void topOfColumn() {
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    //getting to the top of the Column
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    turnLeft();
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    goToWall();
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    turnAround();
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    }
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    public void putBeeperInColumn() {
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    //putting beepers into the empty parts of the column
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    while (frontIsClear()) {
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    if (noBeepersPresent()) {
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    putBeeper();
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    }
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    move();
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    }
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    if (noBeepersPresent()) {
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    putBeeper();
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    }
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    }
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    public void goToWall() {
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    while(frontIsClear()){
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    move();
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    }
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    }
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    public void nextColumn() {
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    //going to the next column in the world
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    turnLeft();
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    move();
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    move();
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    move();
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    move();
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    }
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    }