let speed = 0;

let dd = x;

​

let serial;

let portName = '/dev/tty.usbmodem14601'; // fill in your serial port name here

let breathe = 0; // size of the circle)))

​

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  //serial stuff

  serial = new p5.SerialPort();

  serial.on('connected', serverConnected);

  serial.on('data', serialEvent); // callback for when new data arrives

  serial.open(portName); // open a serial port

​

}

​

function draw() {

    background(0)

if (breathe==1){

    speed = 1

}

else if (breathe==0){

    speed = -1

}

​

  x = x + speed

  dd = x

  fill(255)

  circle(width / 2, height / 2, dd)

}

​

​

function serialEvent() {

  let data = serial.read();

​

  breathe= int(data);

  console.log("DATA-",  data,  breathe);

​

}

​