RGB-Test_LCD.ino

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(13, 12, 10, 9, 8, 7);

int REDLED = 3;           // the PWM pin the LED is attached to
int BLUELED = 5;
int GREENLED= 6;

// the setup routine runs once when you press reset:
void setup() {
  // declare pin 9 to be an output:
  pinMode(REDLED, OUTPUT);
  pinMode(BLUELED, OUTPUT);
  pinMode(GREENLED, OUTPUT);
  lcd.begin(16, 2);
  // initialize the serial communications:
  Serial.begin(9600);
  lcd.write("RGB LED Flashing !");
}

// the loop routine runs over and over again forever:
void loop() {

  digitalWrite(REDLED,HIGH);
  delay(1000);
  digitalWrite(REDLED,LOW);
   delay(1000);
    digitalWrite(BLUELED,HIGH);
  delay(1000);
  digitalWrite(BLUELED,LOW);
   delay(1000);
    digitalWrite(GREENLED,HIGH);
  delay(1000);
  digitalWrite(GREENLED,LOW);
   delay(1000);
  
}