rename background-set class

js/background-set.js

@@ -1,4 +1,4 @@
-class DummyBodyBackground {
+class BackgroundSet {
 
 	constructor() {
 		this._body = document.body;

js/script.js

@@ -2,7 +2,7 @@
 const config = new Config();
 
 // Instantiate dummy background setter
-const dummyBodyBackground = new DummyBodyBackground();
+const backgroundSet = new BackgroundSet();
 
 // Instantiate a clock object
 const clock = new Clock();