// 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();
let num=4; // min=2 max=10 step=1 number of vertices
vertices=[]
j=0
while(j<num){
    x=50*Math.sin(j*(6.283185/num))
    y=50*Math.cos(j*(6.283185/num))
    vertices.push([x,y])
    j++
}
turtle.goto(0,0)
turtle.pendown()
// The walk function will be called until it returns false.
c=0
pre=[0]
function walk(i) {
    n=Math.ceil(Math.random()*vertices.length)-1;
    c1=pre[i]
    c2=pre[i-1]
    if(c1==c2){
        while((c+1)%num==n||(c-1)%num==n){
            n=Math.ceil(Math.random()*vertices.length)-1;
        }
    }
    let r=0.618 //min=0 max=1 step=0.01
    x=turtle.xcor()+(vertices[n][0]-turtle.xcor())*r
    y=turtle.ycor()+(vertices[n][1]-turtle.ycor())*r
    turtle.jump(x,y)
    turtle.circle(0.04)
    c=n
    pre.push(c)
    return i<90000
}