function start(){
    startme();
    buildTower();
    putBall();
}
//This function make Karel face north is Karel is facing west.
function startme(){
    if(facingWest()){
        turnRight();
    }
    if(facingEast()){
        turnLeft();
    }

    if(facingSouth()){
        turnLeft();
        turnLeft();
      }
   }
//This function makes Karel put the tennis balls up to the top of the "world".

function buildTower(){
     while(frontIsClear()){
         putBall();
          move();
    }
 }