From the recording Backing and Jam Tracks for Bass Guitar Vol. 6
This happy-sounding backing track is full of major chords and will out you in a good mood after one time through the chord progression. Try taking a bass solo using the G Major Pentatonic scale (the same notes as the E Minor Pentatonic Scale, by the way). You can "blues it up" by shifting to the G Minor Pentatonic Scale at the end of the progression - a really cool sound! 140 BPM.
||: G | C | G | C | G | C | D7 | :||