import processing.serial.*;
 
int lf = 10;    // Linefeed in ASCII
int value;
String myString = null;
Serial myPort;  // The serial port

Button button;
void setup(){
  size(800,600);
  background(0);
  button = new Button(300, 300, " START ");
  

  // List all the available serial ports
  println(Serial.list());
  // I know that the first port in the serial list on my mac
  // is always my  Keyspan adaptor, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[0], 9600);
  myPort.clear();
  // Throw out the first reading, in case we started reading 
  // in the middle of a string from the sender.
  myString = myPort.readStringUntil(lf);
  myString = null;
  
  
}
void draw(){

  
    while (myPort.available() > 0) {
    myString = myPort.readStringUntil(lf);
    if (myString != null) {
      myString = trim(myString);
      value = int(myString);
      println(value);
    }
  }
  background(150);
  button.draw();
    textSize(25); 
    text(value, 60, 120); //Here's the text call.
    text("Turns:",60, 60); //Here's the text call.
    
  
  
}
void mousePressed(){
  if(button.over()){
    myPort.write('0');
  }
}
class Button{
  int x,y;
  String label;
  Button(int x, int y, String label){
    this.x = x;
    this.y = y;
    this.label = label;
  }
  void draw(){
    fill(200);
    if(over()){
  fill(255);
    }
    rect(x, y, textWidth(label), 25);
    fill(0);
    text(label, x, y + 20);
  }
  boolean over(){
    if(mouseX >= x && mouseY >= y && mouseX <= x + textWidth(label) && mouseY <= y + 22){
  return true;
    }
    return false;
  }
}