b&w

float x = 506;
float y = 113;
float speedX = 7;
float speedY = 7;
float circleSize = 10;

void setup(){
   size(800, 800);
   background(#80D7EA);
}

void draw(){
  // Behavior

  noFill();
  stroke(random(255));
  strokeWeight(random(7));
  x = x+speedX;
  y = y+speedY;
  circleSize = random(25, 16)/9;

  // Drawing the ellipse
  ellipse(x,y,random(49),random(25));

  //Reset the position
  x += speedX;
  if(x > width || x < 0){
    speedX *= -1;
  }

  y += speedY;
  if(y > height || y < 0){
    speedY *= -1;
  }
}