Compile and run the application. You should see the stone texture from before in the upper-right corner of the quad. The other three parts of the quad should be lines of different colors.
What just happened?
We changed the texture mode to clamp. This mode uses the border pixels of a texture to fill all texture coordinates that are greater than 1. In practice, this means the border of an image gets stretched over the model; we can see this effect in the preceding image.