Canvas.setpenopacity(-0.1);
const steps = 24000;
const size = 61;
const turtle = new Turtle();

function walk(i) {
    turtle.penup();
    const term =  1.0357902468 * 2 * Math.PI * i/steps;
    turtle.goto(size * Math.sin(term), size * Math.cos(term));
    turtle.pendown();
    const len = 5+2.5*Math.sin(0.5 * Math.PI + term)*Math.cos(0.5 * Math.PI + term);
    for (let l = 0.02; l < len; l*=1.01) {
         turtle.right(Math.sin(l + steps/8 * term))
         turtle.forward(l);
    }
    return i < steps;
}