let f = 200;

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES);

  osc = new p5.Oscillator();

  osc.start();

  osc.freq(800);

  osc.freq(20, 10);

}

​

function draw() {

  background(220);

  textAlign(CENTER);

  textSize(30);

  translate(width/2, height/2);

  rotate(45)

  text("The sound of gradual disappointment", 0, 0);

  if(osc.getFreq() == 20){

    osc.stop();

  }

}