Fix cloud_len bug

Author: MjavadH

Minimal/SkyFly-Day/index.html

@@ -21,8 +21,7 @@ <h1>4</h1>
 <script>
     let background = document.getElementById("background");
     let clouds = [];
-    let cloud_len = 15;
-
+    let cloud_len = window.innerWidth >= 768 ? 14 : 7;
     function CreateCloud(length) {
         for (let i = 0; i < length; i++) {
             let Cloud = document.createElement("img");