MFI.ino

const int pulsePin = 13;
const int pulseLength = 10; // Pulse time in milliseconds
const int pulseDelay = 10; // Delay between pulses

void setup() {
  pinMode(pulsePin, OUTPUT);
}

void loop() {
  digitalWrite(pulsePin, 1);
  delay(pulseLength);
  digitalWrite(pulsePin, 0);
  delay(pulseDelay);
}