import processing.serial.*;
import cc.arduino.*;

Arduino arduino; //load Arduino library
int ledPin = 13; //without Firmata this would be declared in Arduino sketch

void setup()
{
println(Arduino.list()); //list available ports - use USB port
arduino = new Arduino(this, Arduino.list()[0]); // v2
//arduino = new Arduino(this, Arduino.list()[0], 57600); // v1
arduino.pinMode(ledPin, Arduino.OUTPUT);

size(200, 200);
noStroke();
frameRate(30);
}

void draw()
{
background (255);
if (mouseOverRect() == true) {  //if mouse over square
fill(242, 204, 47);  //yellow color
arduino.digitalWrite(ledPin, Arduino.HIGH);  //LED on
} else {
fill(0);  //black color
arduino.digitalWrite(ledPin, Arduino.LOW);  //LED off
}
rect(50, 50, 100, 100);  //draws the square
}

boolean mouseOverRect() {
return ((mouseX >= 50) && (mouseX <= 150) && (mouseY >= 50) && (mouseY <= 150));
}