Need to have a song edited

We need the words of a song changed. It’s a theme song someone made for the Kansas City Chiefs called Red Kingdom and they put it on YouTube. We have a competition at a youth camp and we need it to be about the green kingdom ?! Hoping someone has the skills to help us change it! Below is the link to the song for reference

https://m.youtube.com/watch?v=FowoI-Dv0io