// 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();
const iterations=140; // min=2, max=150, step=1

turtle.penup();
turtle.goto(-50,-20);
turtle.pendown();

function randomNumber(min, max) {
    return Math.random() * (max - min) + min;
}

var roots = [[20,400],[36,300],[53,500],[82,400],[137,400],[234,300],[295,500],[332,400]];

function centered_circle(radius,start,arclength) {
    turtle.jump(0,0);
    turtle.setheading(0);
    turtle.penup();
    turtle.forward(radius);
    turtle.setheading(90);

    turtle.circle(radius,start-arclength/(2*radius));
    turtle.pendown();
    turtle.circle(radius,arclength/radius);    
}
// The walk function will be called until it returns false.
function walk(i) {
    let j=0;
    while (j < roots.length) {
        centered_circle(i,roots[j][0],roots[j][1]);

        if(roots[j][1]>randomNumber(70,600)) {
            roots[j]=[roots[j][0]-30,50];
            roots.splice(j+1,0,[roots[j][0]+30,50]);
        }
        else {
            roots[j]=[roots[j][0]*randomNumber(.98,1.02),roots[j][1]*randomNumber(.5,1.8)];
        }
        j++;
    }

    return i < iterations;
}