diff --git a/src/Background/Animation.vala b/src/Background/Animation.vala
index 4f2a60e3..35b4ee3b 100644
--- a/src/Background/Animation.vala
+++ b/src/Background/Animation.vala
@@ -1,74 +1,65 @@
-//
-//  Copyright (C) 2014 Tom Beckmann
-//
-//  This program 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.
-//
-//  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
-//
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-FileCopyrightText: 2024 elementary, Inc. (https://elementary.io)
+ *                         2014 Tom Beckmann
+ */
 
-namespace Gala {
-    public class Animation : Object {
-        public string filename { get; construct; }
-        public string[] key_frame_files { get; private set; default = {}; }
-        public double transition_progress { get; private set; default = 0.0; }
-        public double transition_duration { get; private set; default = 0.0; }
-        public bool loaded { get; private set; default = false; }
+public class Gala.Animation : Object {
+    public string filename { get; construct; }
+    public string[] key_frame_files { get; private set; default = {}; }
+    public double transition_progress { get; private set; default = 0.0; }
+    public double transition_duration { get; private set; default = 0.0; }
+    public bool loaded { get; private set; default = false; }
 
-        private Gnome.BGSlideShow? show = null;
+    private Gnome.BGSlideShow? show = null;
 
-        public Animation (string filename) {
-            Object (filename: filename);
-        }
+    public Animation (string filename) {
+        Object (filename: filename);
+    }
 
-        public async void load () {
-            show = new Gnome.BGSlideShow (filename);
+    public async void load () {
+        show = new Gnome.BGSlideShow (filename);
 
-            show.load_async (null, (obj, res) => {
-                loaded = true;
+        show.load_async (null, (obj, res) => {
+            loaded = true;
 
-                load.callback ();
-            });
+            load.callback ();
+        });
 
-            yield;
-        }
+        yield;
+    }
 
 #if HAS_MUTTER45
-        public void update (Mtk.Rectangle monitor) {
+    public void update (Mtk.Rectangle monitor) {
 #else
-        public void update (Meta.Rectangle monitor) {
+    public void update (Meta.Rectangle monitor) {
 #endif
-            string[] key_frame_files = {};
+        string[] key_frame_files = {};
 
-            if (show == null)
-                return;
-
-            if (show.get_num_slides () < 1)
-                return;
-
-            double progress, duration;
-            bool is_fixed;
-            string file1, file2;
-            show.get_current_slide (monitor.width, monitor.height, out progress, out duration, out is_fixed, out file1, out file2);
-
-            transition_duration = duration;
-            transition_progress = progress;
-
-            if (file1 != null)
-                key_frame_files += file1;
-
-            if (file2 != null)
-                key_frame_files += file2;
-
-            this.key_frame_files = key_frame_files;
+        if (show == null) {
+            return;
         }
+
+        if (show.get_num_slides () < 1) {
+            return;
+        }
+
+        double progress, duration;
+        bool is_fixed;
+        string file1, file2;
+        show.get_current_slide (monitor.width, monitor.height, out progress, out duration, out is_fixed, out file1, out file2);
+
+        transition_duration = duration;
+        transition_progress = progress;
+
+        if (file1 != null) {
+            key_frame_files += file1;
+        }
+
+        if (file2 != null) {
+            key_frame_files += file2;
+        }
+
+        this.key_frame_files = key_frame_files;
     }
 }