/* SPDX-License-Identifier: GPL-3.0 * Arduino blink * * blink.ino * * This simple ardiuno program will blink the built-in LED on and off. * * COPYRIGHT NOTICE * Copyright (C) 2024-2025 0x4248 and contributors * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the license is not changed. * * This software is free and open source. Licensed under the GNU general * public license version 3.0 as published by the Free Software Foundation. */ void setup() { pinMode(LED_BUILTIN, OUTPUT); } void loop() { digitalWrite(LED_BUILTIN, HIGH); delay(1000); digitalWrite(LED_BUILTIN, LOW); delay(1000); }