void setup() {
  // put your setup code here, to run once:
Serial.begin (9600);
pinMode(8, OUTPUT);
}

void loop() {
    if (Serial.readString()=="l"){
      digitalWrite(8, HIGH);
    }
    else if (Serial.readString()=="d") {
      digitalWrite(8, LOW);
    }
    else if (Serial.readString()=="i")
    digitalWrite(8, !digitalRead(8));
  
  
}