Pop Rock 5 TEST
Copy the image that I have attached - it describes Circel Of Fifths, ie how to achieve harmonies in their music, going up or going down in tone / chord - it is always a good help on the right path for the untrained.
Otherwise, search for your favorite search engine for Circel Of Fifths, which are oceans and learn from.
Please be happy and make magix music, I always try.