CodeHS 1.12.5: Invert

public class KarelProgram extends Karel
{
    public void run()
    {
        for(int i = 0; i < 20; i++)
        {
            invertBall();
    	    safeMove();
        }
    }

    private void invertBall()
    {
    	if(noBallsPresent())
    	{
    		putBall();
    	}
    	else
    	{
    	    takeBall();
    	}
    }
    private void safeMove()
    {
    	if(frontIsClear())
    	{
    		move();
    	}
    }
}