Hi nikolaj.spliid,

Writing original music is pretty tough. But there are a few great ways to put something together. It's important to know some basic chord progressions and another important thing is to be able to simply let yourself experiment and have fun. Throw everything at the wall, and see what you like.

Here's a lesson from Anders on writing music: https://www.guitartricks.com/lesson.php?input=28163

I hope that helps, and good luck!