// 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();

// The walk function will be called until it returns false.
function walk(i) {
    dashedLine(-95, -60, 95, -60, [1,2,3,2]);
    dashedLine(-95, -60, -95, 60, [1,2,3,2]);
    dashedLine(-95, 60, 95, 60, [1,2,3,2]);
    dashedLine(95, -60, 95, 60, [1,2,3,2]);
    
    turtle.jump(-80, -61);
    turtle.seth(180);
    turtle.circle(2)
    turtle.jump(-80, -59);
    turtle.seth(0);
    turtle.circle(2);
    
    turtle.jump(-80, -61);
    turtle.goto(-70, -58);
    turtle.jump(-80, -59);
    turtle.goto(-70, -62);
    
    return false;
}

function dashedLine(x1, y1, x2, y2, pattern = [500]) {
    turtle.jump(x1, y1);
    turtle.setheading(y2 > y1? 90 : 270);
    let len = Math.sqrt((x2-x1)**2 + (y2-y1)**2);
    if(x1 != x2) {
        turtle.setheading((x2-x1 < 0? 180: 0) + Math.atan((y2 - y1) / (x2 - x1)));
    }
    let tr = 0;
    let i = 0;
    turtle.penup();
    while(tr < len) {
        let inc = pattern[i % pattern.length];
        turtle.isdown()? turtle.penup(): turtle.pendown();
        turtle.forward(inc + tr > len? len - tr: inc);
        i++;
        tr+=inc;
    }
    turtle.pendown();
}