let speed = 5;

let Vspeed;

let y = 0;

​

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() 

{

  background(220);

  noFill();

​

  if (x >= width - 25)

  { 

    speed = -5;

  } 

  else if (x <= 0)

  { 

    speed = 5;

  }

​

  x += speed; 

  fill(255,0,0);

  strokeWeight(0)

  circle(x, height/2, 50);

  /////////////////////////////////////////

  if (y >= height - 25)

  { 

    Vspeed = -10;

  } 

  else if (y <= 0)

  { 

    Vspeed = 10;

  }

  y += Vspeed;

  circle(width/2,y,50)

  // circle(random(width), random(height), 50)

  // circle(random(width), random(height), 50)

​

​

}