import processing.serial.*; // Importing the serial library to communicate with the Arduino 
Serial myPort;      // Initializing a vairable named 'myPort' for serial communication
float background_color ;   // Variable for changing the background color


void setup ( ) {
size (500,  500);     // Size of the serial window, you can increase or decrease as you want
myPort  =  new Serial (this, "/dev/cu.usbmodem14101",  9600); // Set the com port and the baud rate according to the Arduino IDE
myPort.bufferUntil ( '\n' );   // Receiving the data from the Arduino IDE
} 

void serialEvent  (Serial myPort) {
background_color  =  float (myPort.readStringUntil ( '\n' ) ) ;  // Changing the background color according to received data
} 


void draw ( ) {
background ( 150, 50, background_color );   // Initial background color, when we will open the serial window 
if ( mousePressed  &&  ( mouseButton  ==  LEFT ) ) { // if the left mouse button is pressed
myPort.write ( '1' ) ;       // send a '1' to the Arduino IDE
} 

if (mousePressed  &&  ( mouseButton == RIGHT ) ) {  // if the right mouse button is pressed
myPort.write ( '0' ) ;     // Send a '0' to the Arduino IDE
}

}