let portName = "/dev/tty.usbmodem21201"; // fill in your serial port name here

let inData;

function setup() {

  createCanvas(500, 500);

  serial = new p5.SerialPort(); // make a new instance of the serialport library

  serial.on("list", printList); // set a callback function for the serialport list event

  serial.on("connected", serverConnected); // callback for connecting to the server

  serial.on("open", portOpen); // callback for the port opening

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

  serial.on("error", serialError); // callback for errors

  serial.on("close", portClose); // callback for the port closing

​

  serial.list(); // list the serial ports

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

}

function serverConnected() {

  console.log("connected to server.");

}

​

function portOpen() {

  console.log("the serial port opened.");

}

​

function serialEvent() {

  inData = Number(serial.read());

}

​

function serialError(err) {

  console.log("Something went wrong with the serial port. " + err);

}

​

function portClose() {

  console.log("The serial port closed.");

}

​

// get the list of ports:

function printList(portList) {

  // portList is an array of serial port names

  for (var i = 0; i < portList.length; i++) {

    // Display the list the console:

    console.log(i + portList[i]);

  }

}

function draw() {

  background(0);

  fill(255);

  text("sensor value: " + inData, 30, 50);

  // ellipse(200,200,inData)

   petals();

​

  //center of flower

  stroke(255);

  fill(255, 174, 13);

  ellipse(250, 250, inData);

}

​

function petals() {

​

  push();

​

  stroke(255);

  fill(255, 244, 25);

​

  translate(250, 250); //changes 0,0 point to 250, 250

  rotate(radians(40));

  ellipse(75, 0, inData,50); // start from 75 (tip of ellipse, 150/2), since ellipse is 150 wide

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

  rotate(radians(40));

  ellipse(75, 0, inData,50);

​

  pop();

​

  //OR

  /* for (let i = 0; i < 20, i ++){

rotate(radians(360/20));

ellipse(60, 0, 120, 20);

} */

​

}

​

​