 void loop()
 {
   flashCircle();
-  delay(overallDelay * 1000l);
+  delay(overallDelay * 1000);
 }
 
 void flashCircle()

const int flashPins[] = {7, 6, 5};

const int overallDelay = 30; // seconds
const int delayBetweenFlashes = 1; // seconds

void setup()
{

    digitalWrite(flashPins[i], HIGH);
    delay(200);
    digitalWrite(flashPins[i], LOW);
    delay(delayBetweenFlashes * 1000);
  }
}

