diff --git a/lab1/example/example.js b/lab1/example/example.js
index 2d7e40634eb47d9833313235f266b1bf38734d65..751b7bf3ae571b4a29b9e6bbfbf7feea2f96aa60 100644
--- a/lab1/example/example.js
+++ b/lab1/example/example.js
@@ -87,7 +87,7 @@ function initVertexBuffers(gl) {
     3/5,  -5/7,
 
   ]);
-  const n = vertices.length; // The number of vertices
+  const n = vertices.length / 2; // The number of vertices
 
   // Create a buffer object
   const vertexBuffer = gl.createBuffer();