The other primary technique is called the stretch, and it has two variations on it. You will leave your hand on the same four notes the whole time, but one of your fingers will be responsible for two notes. At first, many people use this approach and try to stretch their pinky to play both blue and orange, but because of the general weakness and shorter length of that finger, most people end up changing. Instead of stretching the pinky, you hold your fingers over the red, yellow, blue, and orange notes, and stretch your index finger for all green notes. This finger is much more versatile than the pinky, allowing for more ease in making the stretch. Also, the green and red notes are usually in easier sections of the songs, making for less work than a blue-orange stretch. The difficulty with this is twofold. You are no longer in a "one finger, one note" mindset, which is a big change from the way easy and medium are played. Also, when you encounter chords that contain both the green and red notes, or the blue and orange, depending on your stretched finger, you have to hold both with one finger. That is a bit of a challenge, but when you have a song that goes from a green-red chord to just the green or red, or between combinations of all three quickly, you can get confused easily.