var ball_num;

var ballX = [];

var ballY = [];

var speedX = [];

var speedY = [];

var ball_color = [];

var ball_diameter = [];



var colors = [];



function setup() {

  createCanvas(windowWidth,

               windowHeight);



  ball_num = 800;



  colors.push(color(255, 246, 127));

  colors.push(color(193, 219, 129));

  colors.push(color(97, 193, 190));

  colors.push(color(84, 195, 241));

  colors.push(color(115, 184, 226));

  colors.push(color(108, 155, 210));

  colors.push(color(252, 250, 242));

  colors.push(color(216, 190, 189));



  for (var i = 0; i < ball_num; i = i + 1) {

    ballX[i] = random(0, windowWidth);

    ballY[i] = random(0, windowHeight);

    speedX[i] = random(6.0, 2.0);

    speedY[i] = random(8.0, 8.0);

    ball_color[i] = floor(random(0, colors.length));

    ball_diameter[i] = random(5, 20);

  }

}



function draw() {

  background(0, 55, 117, 100);

  noStroke();



  for (var i = 0; i < ball_num; i++) {

    ballX[i] = ballX[i] + speedX[i];

    ballY[i] = ballY[i] + speedY[i];



    if (ballX[i] > windowWidth || ballX[i] < 0) {

      speedX[i] = -1 * speedX[i];

    }



    if (ballY[i] > windowHeight || ballY[i] < 0) {

      speedY[i] = -1 * speedY[i];

    }

  }



  for (var i = 0; i < ball_num; i++) {

    fill(colors[ball_color[i]]);

    ellipse(ballX[i], ballY[i], ball_diameter[i]);

  }



}