function drawRhombus(x, y, w, r, innerAngle, rotation, mirror = false) {
    turtle.jump(x, y);
    if(mirror) { rotation = 112+rotation; innerAngle *= -1; }
    turtle.setheading(rotation);
    turtle.penup();
    turtle.backward(r);
    turtle.pendown();
    turtle.left(innerAngle / 2);
    turtle.forward(w);
    turtle.right(innerAngle);
    turtle.forward(w);
    // turtle.right(180 - innerAngle);
    // turtle.forward(w);
    // turtle.right(innerAngle);
    // turtle.forward(w);
}

Canvas.setpenopacity(.7);
const turtle = new Turtle();

turtle.jump(10, 0);
turtle.goto(-10, 0);
turtle.jump(0, 10);
turtle.goto(0, -10);

var sideLength = 7
r = Math.sqrt(sideLength * sideLength * 2);

// The walk function will be called until it returns false.
function walk(i) {
    var angle = (i / 18) * (Math.PI);
    var radius = 85;
    drawRhombus(radius * Math.sin(angle), radius * -Math.cos(angle), sideLength, r, 70, 35 + (i * 10));
    if(i < 30) {
        angle = (i * Math.PI) / 15;
        radius = 65;
        drawRhombus(radius * Math.sin(angle), radius * -Math.cos(angle), sideLength, r, 70, 35 + (i * 12), true);
    }
    return i < 36;
}