#include <Arduino.h>
/*RGB LED pins (Common Cathode)*/
#define Red_Pin 11
#define Green_Pin 10
#define Blue_Pin 9
/*Delay (in milliseconds)*/
#define COLOR_CHANGE_DELAY 1000
void setup() {
/*Initialize the RGB LED pins as outputs*/ 
pinMode(Red_Pin, OUTPUT); pinMode(Green_Pin, OUTPUT); pinMode(Blue_Pin, OUTPUT);
}
void loop() {
/*Turn on Red, turn off Green and Blue*/ 
digitalWrite(Red_Pin, HIGH); digitalWrite(Green_Pin, LOW); digitalWrite(Blue_Pin, LOW); 
delay(COLOR_CHANGE_DELAY);
/*Turn off Red, turn on Green, turn off Blue*/ 
digitalWrite(Red_Pin, LOW); digitalWrite(Green_Pin, HIGH); digitalWrite(Blue_Pin, LOW); 
delay(COLOR_CHANGE_DELAY);
/*Turn off Red, turn off Green, turn on Blue*/ 
digitalWrite(Red_Pin, LOW); digitalWrite(Green_Pin, LOW); digitalWrite(Blue_Pin, HIGH);
delay(COLOR_CHANGE_DELAY);
/*Turn ON Red,Green,Blue*/ 
digitalWrite(Red_Pin, HIGH); digitalWrite(Green_Pin, HIGH); digitalWrite(Blue_Pin, HIGH); 
delay(COLOR_CHANGE_DELAY);
}