Updated webgl_helpers.html to make polar grid more visible

examples/webgl_helpers.html

@@ -50,9 +50,9 @@
 				gridHelper.position.x = - 150;
 				scene.add( gridHelper );
 
-				var polarGridHelper = new THREE.PolarGridHelper( 100, 16, 8, 50, 0x0000ff, 0x808080 );
+				var polarGridHelper = new THREE.PolarGridHelper( 200, 16, 8, 50, 0x0000ff, 0x808080 );
 				polarGridHelper.position.y = - 150;
-				polarGridHelper.position.x = 150;
+				polarGridHelper.position.x = 200;
 				scene.add( polarGridHelper );
 
 				var loader = new THREE.JSONLoader();