// You can find the Turtle API reference here: https://turtletoy.net/syntax
Canvas.setpenopacity(1);

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

function fertility(startx, starty, magnitude) {
    turtle.penup();
    turtle.goto(startx, starty);
    turtle.pendown();
    turtle.circle(-magnitude/2, 180);
    turtle.forward(magnitude * 7 / 4);
    turtle.left(90);
    turtle.circle(magnitude/2);
    turtle.penup();
    turtle.forward(magnitude);
    turtle.pendown();
    turtle.circle(magnitude/2);
    turtle.left(90);
    turtle.forward(magnitude * 7 / 4)
    turtle.left(90);
    turtle.forward(magnitude/2);
    turtle.right(90);
    turtle.forward(magnitude/2);
    turtle.backward(magnitude/2);
    turtle.left(90);
    turtle.forward(magnitude/2);
    turtle.left(90);
    turtle.forward(magnitude*7/4)
    turtle.left(180);
}
function walk(i) {
    fertility(10, 10, 30);
    turtle.left(20)
    return (i < 18);
}