int ringPin = 9;
int glintLeftPin = 11;
int glintRightPin = 6;

void setup() {
  // Set up all the LED pins
  pinMode(ringPin, OUTPUT);
  pinMode(glintLeftPin, OUTPUT);
  pinMode(glintRightPin, OUTPUT);
}

void loop() {
  // Turn off glints, turn on ring
  digitalWrite(glintLeftPin, LOW);
  digitalWrite(glintRightPin, LOW);
  digitalWrite(ringPin, HIGH);
  delay(1000);

  // Turn off ring, turn on glints
  digitalWrite(ringPin, LOW);
  digitalWrite(glintLeftPin, HIGH);
  digitalWrite(glintRightPin, HIGH);
  delay(1000);
}