const int ledPin1 = 21;
const int ledPin3 = 27;
const int ledPin5 = 14;
const int ledPin2 = 22;
const int ledPin4 = 17;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin5, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin4, OUTPUT);

}

void loop() {
digitalWrite(ledPin1, HIGH);
delay(1000); 
digitalWrite(ledPin3, HIGH);
delay(1000);
digitalWrite(ledPin5, HIGH);
delay(1000);
digitalWrite(ledPin2, HIGH);
delay(1000);
digitalWrite(ledPin4, HIGH);
delay(1000);

digitalWrite(ledPin1, LOW);
delay(1000);
digitalWrite(ledPin3, LOW);
delay(1000);
digitalWrite(ledPin5, LOW);
delay(1000);
digitalWrite(ledPin2, LOW);
delay(1000);
digitalWrite(ledPin4, LOW);
delay(1000);
}