I'm pretty certain that it has been discussed previously in this thread. See if any of the posts here can help you. You could also just look around the internet for answers to your problem. I'm certain that people have had the same problem.
That is a very interesting result. I see that you used the invert feature a lot. It looks pretty cool. I like how you made it seem like chaos and destruction. Very nice! I'm going to give you a few quick tips. A good thing to do with signatures is to add a border. You can do that by...
Took the words right out of my mouth Kybyrian.
Very good job TheHeroOfLime! Keep up the good work. It's not that bad for a first GIMP signature! I expect great things from you!
Well, i finally decided to follow the tutorial. Here is my result.
The tutorial is well done, but what helps is if you put all of the images and text inside a single image. Save people from opening new tabs for every single step. But very well done.