//Project 2 - Traffic Lights Arduino
int ledDelay = 500; // delay in between changes 
int redPin = 10;
int yellowPin = 9;
int greenPin = 8;

void setup() {
   pinMode(redPin, OUTPUT);
   pinMode(yellowPin, OUTPUT);
   pinMode(greenPin, OUTPUT);
}


void loop() {
  digitalWrite(redPin, HIGH); // trun the red light on
  delay(ledDelay); // wait  5 seconds

  digitalWrite(yellowPin, HIGH); // trun on yellow
  delay(2000); // wait 2 seconds

  digitalWrite(greenPin, HIGH); // trun green on
  digitalWrite(redPin, LOW); // trun red off
  digitalWrite(yellowPin, LOW); // trun yellow off
  delay(ledDelay); // wait ledDelay milliseconds
 
  digitalWrite(yellowPin, HIGH); // trun yellow on
  digitalWrite(greenPin, LOW); // trun green off
  delay(2000); // wait 2 seconds
 

 digitalWrite(yellowPin, LOW); // trun yellow off
  
 // now our loop reapeats
}