Fixed error

seminar-03/README.md

@@ -46,23 +46,23 @@ First, let's create an A-Frame component that writes a message in the browser co
 Then, let's move the JavaScript code for creating a component to a separate JavaScript file.
 
 * [Scene source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/scene_component2.html)
-* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component2.html)
+* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component2.js)
 * [View online](scene_component2.html)
 
 Now, let's add a parameter to the component, so that we can select which message it prints in the console.
 
 * [Scene source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/scene_component3.html)
-* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component3.html)
+* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component3.js)
 * [View online](scene_component3.html)
 
 Now, let's make the component write a message when it receives an event. We will do this by adding an event handler, which will be installed by the component. In the HTML scene, it will write a message when it is clicked.
 
 * [Scene source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/scene_component4.html)
-* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component4.html)
+* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component4.js)
 * [View online](scene_component4.html)
 
 Finally, let's make the component create a new entity every time it receives an event. For this, the handler will create a new element in the DOM. In our case, it will create a new `a-box` as a children of the element where the component is.
 
 * [Scene source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/scene_component5.html)
-* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component5.html)
+* [JavaScript source code](https://github.com/jgbarah/aframe-playground/tree/master/seminar-03/component5.js)
 * [View online](scene_component5.html)