Karel: Unit 9, Lesson 2

//Karel must help rebuild
//broken columns. Make a
//column of beepers above
//each beeper you find on
//the first row
function main() {
   while(frontIsClear()){
      checkNPlace();
      move();
   }
}

function checkNPlace(){
   if(beepersPresent()){
      turnLeft();
      while(frontIsClear()){
         move();
         putBeeper();
      }
      turnAround();
      while(frontIsClear()){
         move();
      }
      turnLeft();
   }
}