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

const stepSize = 30;
const radialSpread = 360;
const subdivisions = 11;
const iterations = 3;

function walkAndSplit(t, s, angleSpread, divisions) {
    t.pendown();
    t.fd(s);
    var newTs = [];
    var heading = t.h();
    heading = heading - (angleSpread / 2);
    var angleChange = angleSpread / divisions;
    for (i = 0; i <= divisions; i++) {
        var nt = t.clone();
        nt.seth(heading)
        newTs.push(nt)
        heading += angleChange;
    }
    return newTs;
}

function step(t) {
    return walkAndSplit(t, stepSize, radialSpread, subdivisions)
}

// Global code will be evaluated once.
const turtle = new Turtle();
turtle.penup();
turtle.goto(0,stepSize);
turtle.seth(-90);
turtle.pendown();


var turtles = [turtle];
// The walk function will be called until it returns false.
function walk(i) {
    turtles = turtles.flatMap(step);
    return i < iterations;
}