void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);
if(!Serial) Serial.println("Serial is not ok");
pinMode(3, OUTPUT);
pinMode(4,OUTPUT);
pinMode(5, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(3, HIGH);
digitalWrite(8, HIGH);
Serial.println("red and green is on");
delay(5000);
digitalWrite(3, LOW);
digitalWrite(8, LOW);
Serial.println("red and green is off");
digitalWrite(4, HIGH);
digitalWrite(9, HIGH);
Serial.println("yellow is on");
delay(1500);
digitalWrite(4, LOW);
digitalWrite(9, LOW);
Serial.println("yellow is off");
digitalWrite(5, HIGH);
digitalWrite(10, HIGH);
Serial.println("green and red is on");
delay(5000);
digitalWrite(5, LOW);
digitalWrite(10, LOW);
Serial.println("green and red is off");
digitalWrite(4, HIGH);
digitalWrite(8, HIGH);
Serial.println("yellow is on");
delay(1500);
digitalWrite(4, LOW);
Serial.println("yellow is off");
}