int teal = 2; //Comment! Establish teal as teal led.
int orange = 4; //establish orange as orange led

void setup() {
pinMode(teal, OUTPUT); //teal is an output
pinMode(orange, OUTPUT); //orange is an output
}

void loop() {
 digitalWrite(teal, HIGH); //turn teal on
 delay(1500);
 digitalWrite(teal,LOW); //turn teal off
 digitalWrite(orange, HIGH); //turn teal on
 delay(1500);
 digitalWrite(orange,LOW); //turn teal off
}