// Global code will be evaluated once.
const turtle = new Turtle();

// The walk function will be called until it returns false.
function walk(i) {
    
    if(i == 0)
    {
        turtle.forward(50);
        turtle.left(45);
        turtle.forward(25);
        turtle.left(135);
        turtle.forward(75);
        turtle.right(45);
        turtle.forward(15);
        turtle.backward(15);
        turtle.left(45);
        turtle.forward(50);
        turtle.left(135);
        turtle.forward(25);
        turtle.left(45);
        turtle.forward(10);
        turtle.right(90);
        turtle.forward(10);
        turtle.backward(10);
        turtle.left(90);
        turtle.forward(30);
        
        turtle.penup();
        turtle.forward(100);
        turtle.left(90);
        turtle.forward(5);
        turtle.right(90);
        turtle.pendown();
        
    }
    else 
    {
        if(i % 2 == 0)
        {
            turtle.left(90);
            turtle.circle(10, 180);
            turtle.right(90);
        }
        else
        {
            turtle.right(90);
            turtle.circle(10, 180);
            turtle.left(90);
        }
        
        
    }
    
    return i < 12;
}