Arduino basic police lights with LED's

This simple program uses 2 Red LED's and 2 blue LED's to simulate police lights. I used RGB LED's because that's all I had at the time, but any red/blue led will work fine. Check in the code below for which pins to attach the lights to.


	void setup() {
	// Even numbers = blue, odd numbers = red
	pinMode(4, OUTPUT); // Blue LED
	pinMode(5, OUTPUT); // Red LED
	pinMode(6, OUTPUT); // Blue LED
	pinMode(7, OUTPUT); // Red LED
	}

	void loop() {

	// Flash blue lights 3 times
	for (int a=1; a<=3; a++) {
		digitalWrite(4, HIGH);
		digitalWrite(6, HIGH);
		delay(75);
		digitalWrite(4, LOW);
		digitalWrite(6, LOW);
		delay(40);
	}
	delay(80);
	
	// Flash red lights 3 times
	for (int a=1; a<=3; a++) {
		digitalWrite(5, HIGH);
		digitalWrite(7, HIGH);
		delay(75);
		digitalWrite(5, LOW);
		digitalWrite(7, LOW);
		delay(40);
	}
	delay(80);
	}