​

function setup() {

  createCanvas(400, 400);

  rectMode(CENTER);

  angleMode(DEGREES);

  frameRate(60);

}

​

function draw() {

  background(220);

  let fc = frameCount;

  let m = millis();

  translate(width/2,height/2);

  rotate(r);

  //r = r + QUARTER_PI * 0.02;

  if (m < 5000){

    r = r+1;

  } else if(m>=5000){

    r=r-1;

  }

  rect(0,0,40,200);

  //console.log(fc,m);

}