import processing.serial.*;

Serial arduino;

void setup() {
  size(700, 600);
  println(Serial.list()[0]);
  String portName = Serial.list()[0]; //change the 0 to a 1 or 2 etc. to match your port
  arduino = new Serial(this, portName, 9600);
}

void draw() {
  if (mousePressed == true)
  {
    if (mouseX >= 0 && mouseX <= 200){
      arduino.write("1c255w");
    } else if (mouseX >= 200 && mouseX <= 400){
      arduino.write("2c255w");
    }
    else if (mouseX >= 400 && mouseX <= 600){
      arduino.write("3c255w");
    }
    else if (mouseX >= 600 && mouseX <= 700){
      arduino.write("1c255w");
      arduino.write("2c255w");
      arduino.write("3c255w");
    }
  } else { 
    arduino.write("1c0w");
    arduino.write("2c0w");
    arduino.write("3c0w");
  }
  fill(255, 0, 0);
  rect(0, 0, 200, 600);
  fill(0, 255, 0);
  rect(200, 0, 200, 600);
  fill(0, 0, 255);
  rect(400, 0, 200, 600);
  fill(255, 255, 255);
  rect(600, 0, 100, 600);
}