#define Red 13
#define Orange 12
#define Yellow 11
#define Green 10
#define Blue 9
#define Purple 8


void setup() {
  pinMode(Red, OUTPUT);
  pinMode(Orange, OUTPUT);
  pinMode(Yellow, OUTPUT);
  pinMode(Green, OUTPUT);
  pinMode(Blue, OUTPUT);
  pinMode(Purple, OUTPUT);
}

void loop() {
  for(byte i = Red; i >= Purple; i--)
  {
    if (i == Yellow)
      i--;
    digitalWrite(i, HIGH);
    delay(1000);
    digitalWrite(i, LOW);
  }

  for (byte i = Red; i >= Purple; i--)
  {
    if (i == Yellow)
      digitalWrite(i, LOW);
    else
      digitalWrite(i, HIGH);
  }
  delay(1000);
for (byte i = Red; i >= Purple; i--)
      digitalWrite(i, LOW);
  delay(2000);
}