  gl.bindBuffer(gl.ARRAY_BUFFER, null);

        gl.bindVertexArray(null);

        loadImage('../assets/img/Di-3d.png', function(image) {
            // -- Init Texture
            var texture = gl.createTexture();
            gl.activeTexture(gl.TEXTURE0);
            gl.bindTexture(gl.TEXTURE_2D, texture);
            gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, false);
            gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA8UI, gl.RGBA_INTEGER, gl.UNSIGNED_BYTE, image);
            gl.texParameteri(gl.TEXTURE_2D,