Hello World rotating grid

index.html

@@ -88,23 +88,17 @@
     <script id="default-fs" type="x-shader/x-fragment">
         precision mediump float;
 
-        varying vec2 v_uv;
-        uniform sampler2D u_texture;
-
         void main(void) {
-            gl_FragColor = texture2D(u_texture, v_uv);
-            //gl_FragColor = vec4(0.0,0.0,1.0,1.0);
+            gl_FragColor = vec4(0.0,0.0,1.0,1.0);
         }
     </script>
     <script id="ndc-vs" type="x-shader/x-vertex">
             attribute vec3 positionAttr;
-            attribute vec2 uv;
 
-            varying vec2 v_uv;
+            uniform mat4 MVP;
          
             void main(void) {
-                gl_Position = vec4(positionAttr, 1.0);
-                v_uv = uv;
+                gl_Position = MVP * vec4(positionAttr, 1.0);
             }
         </script>
 </header>