void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);
if(!Serial)Serial.println("is not oke");
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(2, HIGH);
Serial.println("read is on");
delay(6000);
digitalWrite(2, LOW);
Serial.println("read is off");
digitalWrite(3, HIGH);
Serial.println("yellow is on");
delay(3000);
digitalWrite(3, LOW);
Serial.println("yellow is off");
digitalWrite(4, HIGH);
Serial.println("green is one");
delay(7000);
digitalWrite(4, LOW);
Serial.println("green is off");
digitalWrite(2, LOW);
Serial.println("read is off");
digitalWrite(3, LOW);
Serial.println("yellow is off");

}