// 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();
turtle.penup();

// The walk function will be called until it returns false.
function walk(i) {
    
    if (i % 2 == 0) {
        goto_random();
        draw_0();
    }
    else {
        goto_random();
        draw_1();
    }
    return i<1000;
}

function goto_random() {
    turtle.goto((Math.random() - 0.5) * 195, (Math.random() - 0.5) * 195);
    
}

function goto_random_outer() {
    x = NaN;
    y = NaN;
    while(true) {
        x = (Math.random() - 0.5) * 195;
        y = (Math.random() - 0.5) * 195;
        if (!((x >=-50 && x <= 50) && (y >=-50 && y<=50))) {
            break;
        }
    }
    turtle.goto(x, y);
}

function goto_random_inner() {
     turtle.goto((Math.random() - 0.5) * 100, (Math.random() - 0.5) * 100);
}

function draw_0() {
    size = (Math.random() + 0.1) * 5;
    size=3;
    turtle.setheading(0);
    turtle.pendown();
    turtle.circle(size, extent=90);
    turtle.forward(size);
    turtle.circle(size, extent=180);
    turtle.forward(size);
    turtle.circle(size, extent=90);
    turtle.penup();
}

function draw_1() {
    size = (Math.random()+0.1) * 4;
    turtle.pendown();
    turtle.left(50);
    turtle.forward(size*2.5);
    turtle.right(140);
    turtle.forward(size*5);
    turtle.left(90);
    turtle.penup()
}