#define RED_LED    5
#define YELLOW_LED 4
#define GREEN_LED  3

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if(!Serial) Serial.println("Serial is not ok");
  pinMode(GREEN_LED, OUTPUT);
  pinMode(YELLOW_LED, OUTPUT);
  pinMode(RED_LED, OUTPUT);
}
 
void loop() {
  // put your main code here, to run repeatedly:
  
  digitalWrite(GREEN_LED,HIGH);
  Serial.println("green is on");
  delay(3000);
  digitalWrite(GREEN_LED, LOW);
  Serial.println("green is off");
  digitalWrite(YELLOW_LED, HIGH);
  Serial.println("yellow is on");
  delay(2000);
  digitalWrite(YELLOW_LED, LOW);
  Serial.println("yellow is off");
  digitalWrite(RED_LED, HIGH);
  Serial.println("red is on");
  delay(1000);
  digitalWrite(RED_LED, LOW);
  Serial.println("red is off");
  digitalWrite(GREEN_LED, HIGH);
  Serial.println("green is on");
  delay(1);
  digitalWrite(YELLOW_LED, HIGH);
  Serial.println("yellow is on");
  delay(1);
  digitalWrite(RED_LED, HIGH);
  Serial.println("red is on");
  delay(1);
  digitalWrite(RED_LED, LOW);
  Serial.println("red is off");
  delay(1000);
  digitalWrite(RED_LED, HIGH);
  Serial.println("red is on");
  delay(1200);
  digitalWrite(RED_LED,LOW);
  Serial.println("red is off");
  digitalWrite(YELLOW_LED, HIGH);
  delay(500);
  Serial.println("yellow is on");
  delay(500);
  digitalWrite(YELLOW_LED, LOW);
  Serial.println("yellow is off");
  digitalWrite(GREEN_LED,HIGH);
  Serial.println("green is on");
  delay(1500);
  digitalWrite(GREEN_LED,LOW);
  Serial.println("green is off");

}