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);


}

void loop() {
digitalWrite(3,HIGH);
Serial.println("red is on");
delay(7000);
digitalWrite(3,LOW);
Serial.println("red is of");
delay(0000);
digitalWrite(4,HIGH);
Serial.println("yellow is on");
delay(2000);
digitalWrite(4,LOW);
Serial.println("yellow is of");
delay(0000);
digitalWrite(5, HIGH);
Serial.println("green is on");
delay(10000);
digitalWrite(4, LOW);
Serial.println("green is of");
delay(0000);
digitalWrite(4, HIGH);
Serial.println("yellow is on");
delay(2000);
digitalWrite(4, LOW);
Serial.println("yellow is of");
delay(0000);
}