unsigned long vA = 0;
unsigned long vB = 3600;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
  
  Serial.println("Hello");
  Serial.println(vA-vB);

}

void loop() {
  // put your main code here, to run repeatedly:

}