let B =0;

​

function setup() {

  createCanvas(640, 480);

  ellipseMode(CENTER);

}

​

function draw() {

  clear();

  background(0)

  fill(255,0,B);

  ellipse(ellipseX, height/2, 50, 50);

​

​

  if (!serialActive) {

    text("Press Space Bar to select Serial Port", 20, 30);

  } else {

    text("Connected", 20, 30);  

    // Print the current values

    text('ellipseX = ' + str(ellipseX), 20, 50);

  }

}

​

function keyPressed() {

  if (key == " ") {

    setUpSerial(); //establish serial communication

  }

}

​

function readSerial(data) {  

  if (data) {    //run only if data is received

    data = data.trim(); // Remove any whitespace

    if (!isNaN(data)) { //check whether data is a number or not

      //debug: console.log("Received:", data);

      ellipseX = int(data);

    }

  }

}

​