const int ledPin = 4;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int i = 0; i < 4;i++){
    digitalWrite(ledPin, HIGH);
    delay(10000);
    digitalWrite(ledPin, LOW);
    delay(5000);
  }
    digitalWrite(ledPin, LOW);
    while(true){

    }
}