let t = 0;

let angle0 = 90;

let increment;

​

let r = 100;

let period; 

let frequency;

let cycle = 3;

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  background(220);

  period = 400; 

  frequency = 1/period;

}

​

function draw() {

  x = r*cos(cycle*360/period*t);

  y = r*sin(cycle*360/period*t);

  translate(0, height/2);

  noStroke();

  fill(0);

  ellipse(t, y, 10, 10);

  // fill(255, 0, 0);

  // ellipse(t, y, 10, 10);

  t += 1;

}