String type;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(10, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available() > "") {
    type = Serial.read();    
  }
  
  if(type == "q") {
    digitalWrite(10, HIGH);
  }
}