This is another super simple decoration. You can make a confetti wall using some circular pieces of paper. Let the type of celebration decide what kind of color combination you use. For example, if it's a child's birthday party, you may want to use brightly colored paper. If it's a celebration for an adult, then more muted colors paired with gold might be the better choice. You could even decorate the paper if you wanted to.
However, it's not really necessary, and one of the things we love about this DIY project is just how simple it is. Just attach your pieces of paper to the wall and you're done.