void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(9, OUTPUT);
pinMode(8, OUTPUT);
pinMode(7, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
for (int green=10; green >=1; green--) //10 seconds
{
digitalWrite(7, HIGH);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
Serial.print("Green Time Remaining: "); 
Serial.print(green);
Serial.println(" seconds");
delay(1000);
}

for (int amber=3; amber >=1; amber--) //3 seconds
{
digitalWrite(7, LOW);
digitalWrite(8, HIGH);
digitalWrite(9, LOW);
Serial.print("Amber Time Remaining: ");
Serial.print(amber);
Serial.println(" seconds");
delay(1000);
}

for (int red=8; red >=1; red--)  //8 seconds
{
digitalWrite(7, LOW);
digitalWrite(8, LOW);
digitalWrite(9, HIGH);
Serial.print("Red Time Remaining: ");
Serial.print(red);
Serial.println(" seconds");
delay(1000);
}

}