Selections/Invert
Click on the shadow icon and use these settings.

Selections/Invert
and use these settings.

Now you have made a bar like on this page.
We don't want seams to show. So click on
the deformation tool. and pull up past the image top.

Like this

Don't forget to do the bottom too.

Add a tube to the side, your name or whatever you like.

As this will tile without seams,
you can crop it so it's small in size.

 

I hope you enjoyed this tutorial.