The French tune of Twinkle Twinkle Little Star, written in 1761, is probably one of the most simple melodies we know today. Contrary to popular belief, Mozart did not write it, although he did create 12 variations of it. It remains one of the most recognizable songs today, making it a perfect means for showing how to use chord arpeggios to add style and complexity in making an otherwise simple tune sound more interesting. The first half of this bassline uses several different voicings of an A Maj chord. The highest note in each chord creates the familiar melody. The first arpeggiated chord is root, 3rd, octave. The second chord is root, 3rd, 5th. The third chord is root, 4th, 6th. The fourth chord then returns to root, 3rd, 5th. The second half of the bassline changes a bit moving to a D5 chord, root, 5th, octave -- which is actually an A note with a 4th above and below it. It then moves to an inversion of an A chord, 5th, root, 3rd. The bassline ends with an E chord, root, 3rd, 5th and an A5, root, 5th, octave. All notes are finger plucked using the thumb, 1st and 2nd fingers. I think it would be difficult to play with a pick. Try playing with speed, and let the notes ring as you play. Unfortunately, the MIDI sound is really tacky, but this bassline will sound much better on a real instrument. Have fun with it. This exercise should form a solid foundation in creating and playing chord arpeggios on the bass.