1.10.6

/* Write a program to lay a row of tennis balls
 * across first street. Make sure to test your
 * program on multiple worlds. */
public class TennisBallRowKarel extends SuperKarel
{
    public void run()
    {
        while (noBallsPresent())
        {
            if (frontIsClear())
            {putBall();
            move();}
            else
            {putBall();}
        }
    }
}