​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  fill("red");

  ellipse(left, 50, 50, 50);

}

​

function keyPressed() {

  if (key == " ") {

    // important to have in order to start the serial connection!!

    setUpSerial();

  }

}

​

function readSerial(data) {

  left = map(data, 0, 1023, 0, 400);

}

​

//// Arduino Code

/*

​

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600);

​

}

​

void loop() {

  // put your main code here, to run repeatedly:

  int sensor = analogRead(A0);

  delay(5);

  Serial.println(sensor);

​

}

​

*/