let xposition = 100;

function setup() {

  createCanvas(640, 480);

  textSize(18);

}

function draw() {

  background(0, 255, 0);

  fill(0);

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

}

​

function keyPressed() {

  if (key == " ") {

    // Calls a function to set up the serial connection

    setUpSerial();

  }

}

​

// Function to read data from the serial port

function readSerial(data) {

  // Check if data received is not null

  if (data != null) {

    // Maps the integer value of data from range 0-1023 to 0-640 and updates xposition

    xposition = map(int(data), 0, 1023, 0, 640);

  }

}

​

//Arduino Code

​

// void setup() {

//   // Start serial communication so we can send data

//   // over the USB connection to our p5js sketch

//   Serial.begin(9600);

// }

​

// void loop() {

​

//       int sensor = analogRead(A0);

//       delay(5);

//       Serial.println(sensor);

// }