.TRIANGLES, indices.length, gl.UNSIGNED_SHORT, 0);
    gl.uniform4f(colorMultLoc, 0, 0, 0, 1);
    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, lineIndicesBuffer);
    gl.drawElements(gl.LINES, lineIndices.length, gl.UNSIGNED_SHORT, 0);
    requestAnimationFrame(render);
  }
  requestAnimationFrame(render);
}
</script>
</html>
