#include <Arduino.h> 
  
#define Red_Pin 6 
#define Green_Pin 5 
#define Blue_Pin 3
#define COLOR_CHANGE_DELAY 1000 
 
 
void setup() { 
pinMode(Red_Pin, OUTPUT); 
pinMode(Green_Pin, OUTPUT); 
pinMode(Blue_Pin, OUTPUT); 
} 
 
 
void loop() { 
digitalWrite(Red_Pin, HIGH); 
digitalWrite(Green_Pin, LOW); 
digitalWrite(Blue_Pin, LOW); 
delay(COLOR_CHANGE_DELAY); 
  
digitalWrite(Red_Pin, LOW); 
digitalWrite(Green_Pin, HIGH); 
digitalWrite(Blue_Pin, LOW); 
delay(COLOR_CHANGE_DELAY); 
  
digitalWrite(Red_Pin, LOW); 
digitalWrite(Green_Pin, LOW); 
digitalWrite(Blue_Pin, HIGH);
delay(COLOR_CHANGE_DELAY); 
 
 
digitalWrite(Red_Pin, HIGH); 
digitalWrite(Green_Pin, HIGH); 
digitalWrite(Blue_Pin, HIGH); 
delay(COLOR_CHANGE_DELAY); 
}