diff --git a/hello-gl.v.glsl b/hello-gl.v.glsl
index 28f9ff1..9b1f615 100644
--- a/hello-gl.v.glsl
+++ b/hello-gl.v.glsl
@@ -6,6 +6,10 @@ varying vec2 texcoord;
 
 void main()
 {
+int i=0;
+if(i==0)
+    {
     gl_Position = vec4(position, 0.0, 1.0);
+    }
     texcoord = position * vec2(0.5) + vec2(0.5);
 }