int led1[4] = {1,2,3,4};
int led2[4] = {4,3,2,1};

#define LedRed 12
#define LedBlue 27
#define LedYellow 26
#define LedGreen 25


void setup() {
  // put your setup code here, to run once:
  pinMode(LedRed, OUTPUT);
  pinMode(LedBlue, OUTPUT);
  pinMode(LedYellow, OUTPUT);
  pinMode(LedGreen, OUTPUT);
  Serial.begin(115200);
  for (int i = 0; i < 7; i = i + 1){
    if (i == 0 || i == 6){
      digitalWrite(LedRed,HIGH);
      digitalWrite(LedBlue,LOW);
      digitalWrite(LedYellow,LOW);
      digitalWrite(LedGreen,LOW);
      delay(500);
    }
    else if(i == 1 || i == 5) {
      digitalWrite(LedRed,LOW);
      digitalWrite(LedBlue,HIGH);
      digitalWrite(LedYellow,LOW);
      digitalWrite(LedGreen,LOW);
      delay(500);
    }
   else if(i == 2 || i == 4) {
      digitalWrite(LedRed,LOW);
      digitalWrite(LedBlue,LOW);
      digitalWrite(LedYellow,HIGH);
      digitalWrite(LedGreen,LOW);
      delay(500);
    }
   else if (i == 3){
      digitalWrite(LedRed,LOW);
      digitalWrite(LedBlue,LOW);
      digitalWrite(LedYellow,LOW);
      digitalWrite(LedGreen,HIGH);
      delay(500);
   }
  }
}

void loop() {
  // put your main code here, to run repeatedly:
}