Preview:
void harvestTheField(){
    
  //1. row
    repeat(3){
        pickBeeper();
        turnRight();
        moveForward();
        turnLeft();
        moveForward();
    }
    
    pickBeeper();
    moveForward();
    turnLeft();
    moveForward();
  
  //2. row
    repeat(3){
        pickBeeper();
        moveForward();
        turnLeft();
        moveForward();
        turnRight();
    }
    
    pickBeeper();
    moveForward();
    turnRight();
    moveForward();
  
  //3. row
    repeat(3){
        pickBeeper();
        turnRight();
        moveForward();
        turnLeft();
        moveForward();
    }
    
    pickBeeper();
    moveForward();
    turnLeft();
    moveForward();
  
  //4. row  
    repeat(3){
        pickBeeper();
        moveForward();
        turnLeft();
        moveForward();
        turnRight();
    }
    
    pickBeeper();
    
}
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