let k = 4;

let oR = k*iR;

let x;

let y;

let angle = 0;

let curve;

​

function setup() {

    createCanvas(600, 600);

    curve = new Curve();

    frameRate(5);

}

​

function draw() {

    cx = (oR/2 - iR/2) * cos(-angle);

    cy = (oR/2 - iR/2) * sin(-angle);

    px = cx + iR/2 * -cos(angle);

    py = cy + iR/2 * -sin(angle);

​

    background(51);

    translate(width/2, height/2);

    noFill();

    stroke(255);

    ellipse(0,0,oR);

    push();

    ellipse(cx, cy, iR);

    strokeWeight(6);

    //point(px, py);

    pop();

​

//  curve.getX(px);

//  curve.getY(py);

    curve.addPoint(px,py);

​

    for(let i = 0; i < curve.path.length; i++){

        curve.show();

    }

​

    angle += 0.1;

​

    if (angle >= TWO_PI) {

        curve.reset();

        angle = 0;

    }

}

​