How to delete music off of iphone?

Using itunes?
i want to clear my music off my phone but how even the icloud ones won't come off

1. Connect the iPhone to the computer with a USB cable. The iPhone Explorer program opens automatically when the iPhone is recognized by the computer.
2. Click "File Explorer" in iPhone Explorer to see the file system on the phone. Locate the "Music" folder, or any other folder that contains music you want to delete.
3. Right-click each song you no longer want and click "Delete." If you want to copy the song to your computer first, drag the song to the computer's desktop or any other desired location. After copying is complete, click "Delete."