#define led_Red 0
#define led_Green 1
#define led_Blue 2

// Main
void setup() {
  pinMode(led_Red, OUTPUT);
  pinMode(led_Green, OUTPUT);
  pinMode(led_Blue, OUTPUT);
}

// Loop for repeat the program
void loop() {
  // Blue Color
  digitalWrite(led_Green, LOW);
  digitalWrite(led_Blue, HIGH);
  delay(1000);

  // Red Color
  digitalWrite(led_Blue, LOW);
  digitalWrite(led_Red, HIGH);
  delay(1000);

  // Green Color
  digitalWrite(led_Red, LOW);
  digitalWrite(led_Green, HIGH);
  delay(1000);
}