pong

var serial;
var speedx = 1;
var speedy = 1;
var x = 10;
var y = 0;
var gravity = 0.1;
var pos = 0;
var len = 40;
var score = 0;

function preload() {
  mySound = loadSound('ding.wav');
}

function setup() {
  createCanvas(900, 600);
  rectMode(CENTER);

  noCursor();
  noStroke();

gotData();
  Initialize();

}

function gotData() {


  serial = new p5.SerialPort();
  serial.open("/dev/cu.usbmodem1411");
  serial.onData(gotData);
  this.data = serial.readLine();
  if (this.data.length > 0); {
    if (this.data > 0) {
      pos = map(Number(this.data), 0, 1023, len, width - len);
      rect(pos, height - 10, 2 * len, 20);
    }
  }
}

function draw() {
  Gameplay();

}

function Initialize() {
  createCanvas(900, 600);
  noStroke();
  rectMode(CENTER);
  noCursor();

  this.x = random(width);
}

function Gameplay() {

  background(0, 100);
  stroke(255);
  textSize(50);
  text(score, 800, 500);

  // bouncing ball
  ellipse(x, y, 10, 10);

  // set speed of bouncing ball
  y += speedy;
  x += speedx;
  speedy += gravity;

  // if x value is off screen, change direction
  if (x < 0 || x > width) {
    speedx *= -1;
  }
  // if y value is off the top of screen, change direction
  if (y < 0) {
    speedy *= -1;
  }
  // if ball is hitting paddle, bounce away
  if (y > 580 && x > pos - len && x < pos + len) {
    speedy *= -1;
    score++;
    mySound.setVolume(3);
    mySound.play();


    // if ball does not hit paddle/falls off screen, lose game
   
  } else if (y > height) {
    x = 0;
    cursor();
    background(255, 255, 0);
    stroke(255);
    textSize(40);
    text("Game Over", 320, 300);
  }
}