#include <Ticker.h>

Ticker myTicker;

void toggleLED() {
  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
}

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, LOW);

  // Toggle LED every 0.1 second (100 ms)
  myTicker.attach(0.1, toggleLED);
}

void loop() {
  // Do nothing, ticker handles timing
}