📝 Add documentation to Timer.js

pandora/game_objects/Timer.js

@@ -1,3 +1,24 @@
+/************************************************************************
+ * Timer.js
+ ************************************************************************
+ * Copyright (c) 2021 Pedro Tonini Rosenberg Schneider.
+ *
+ * This file is part of Pandora.
+ *
+ * Pandora is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Pandora is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *     
+ * You should have received a copy of the GNU General Public License     
+ * along with Pandora.  If not, see <https://www.gnu.org/licenses/>.
+ *************************************************************************/
+
 class Timer extends GameObject
 {
     constructor(name, duration = 1, autostart = false, oneShot = false)