let xes = [];

let yes=[];

let xspeeds=[];

let yspeeds=[];

​

​

for (let b = 0 ; b < 50; b++) {

  xes.push(random(width));

  yes.push(random(height));

  xspeed.push (random(-5,5));

  yspeed.push (random(-5,5));

}

​

​

function draw() {

  background(220);

​

  for (let b=0; b<xes.length; b++) {

    xes[b] +=xspeed[b];

    yes[b] +=yspeed[b];

  }

  // What do I need to change here?

function bounceBall() {

  // Bounce the ball

  if (xes[b] < 0 || xes[b] > width) {

    xspeed *= -1;

  }

  if (yes[b] < 0 || xes[b] > height) {

    yspeed *= -1;

  }

}

​

  // Draw the ball

  ellipse(x, y, 50, 50);

}

​