Update "CSS-animations" files

Author: odsantos

7-animation/2-css-animations/1-animate-logo-css/solution.view/index.html

@@ -27,14 +27,14 @@
   <img id="flyjet" src="https://en.js.cx/clipart/flyjet.jpg">
 
   <script>
-    flyjet.onclick = function() {
+    let ended = false; // will change to true after the animation finishes
 
-      let ended = false;
+    flyjet.onclick = function() {
 
       flyjet.addEventListener('transitionend', function() {
-        if (!ended) {
+        if (!ended) { // check to show the message only once
           ended = true;
-          alert('Feito!');
+          alert('Done!');
         }
       });