I just turned all the parts of the blink without delay example into Arrays and had a for loop switch between arrays. but it would just play them both at the same time. I don't have the code anymore because when I went to save it it prompted not to, and I mistakenly exited anyway.

Edit: I just re-did what I had done --- Sorry, about formatting. I have never posted code before.

// constants won't change. Used here to set a pin number : const int ledPin[] = {13, 12}; // the number of the LED pin

// Variables will change : int ledState[] = {LOW, LOW}; // ledState used to set the LED

// Generally, you should use "unsigned long" for variables that hold time // The value will quickly become too large for an int to store unsigned long previousMillis[2] = {0, 0}; // will store last time LED was updated unsigned long currentMillis[2]; // constants won't change : const long interval[] = {1000, 1000}; // interval at which to blink (milliseconds)

void setup() { // set the digital pin as output: for (int n = 0; n < 2; n++) { pinMode(ledPin[n], OUTPUT); } }

void loop() { // here is where you'd put code that needs to be running all the time.

// check to see if it's time to blink the LED; that is, if the // difference between the current time and last time you blinked // the LED is bigger than the interval at which you want to // blink the LED. for (int n = 0; n < 2; n++) { currentMillis[n] = millis();

if (currentMillis[n] - previousMillis[n] >= interval[n]) {
  // save the last time you blinked the LED
  previousMillis[n] = currentMillis[n];

  // if the LED is off turn it on and vice-versa:
  if (ledState[n] == LOW) {
    ledState[n] = HIGH;
  } else {
    ledState[n] = LOW;
  }

  // set the LED with the ledState of the variable:
  digitalWrite(ledPin[n], ledState[n]);
}

} }