Turtle Graphics Do It

// C curve
turtle.penUp();
turtle.turn(-90);
turtle.move(100);
turtle.turn(180);
turtle.penDown();

function f(d){
    if(d < 10){
        turtle.move(d);
        return;   
    }
    d *= 0.7;
    kame.turn(-45);
    f(d);
    kame.turn(90);
    f(d);
    kame.turn(-45);
}

f(200);