// You can find the Turtle API reference here: https://turtletoy.net/syntax
Canvas.setpenopacity(-0.1);

// Global code will be evaluated once.
const turtle = new Turtle();
turtle.pendown();
x=-100
y=-100
samples=5
j=0
const xvals=[]
const yvals=[]
while(j<samples){
    x=-100
    while(x<100){
        y=-100
        while(y<100){
            zx=x+Math.random()*2-1
            zy=y+Math.random()*2-1
            zx=zx/100
            zy=zy/100
            zx0=zx
            zy0=zy
            iter=0
            while(iter<100){
                if((zx*zx)+(zy*zy)>4){break;}
                zxt=(zx*zx)-(zy*zy)+zx0
                zy=2*(zx*zy)+zy0
                zx=zxt
                iter++
            }
            if(iter!=100){
                xvals.push(zx0)
                yvals.push(zy0)
            }
            y++
        }
        x++
    }
    j++
}

// The walk function will be called until it returns false.
function walk(i) {
    k=0
    while(k<xvals.length){
        zx=xvals[k]
        zy=yvals[k]
        zx0=zx
        zy0=zy
        j=0
        while(j<i+1){
            zxt=(zx*zx)-(zy*zy)+zx0
            zy=2*(zx*zy)+zy0
            zx=zxt
            j++
        }
        turtle.jump(zx*100,zy*100)
        turtle.circle(0.1)
        k++
    }
    return i<10
}