Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:4/4
K:G
['G2 BG', 'g2 ag/a/ bggd']  
X:1
L:1/8
M:4/4
K:G
|: G2 BG BddB | cBcd ef g2 | G2 BG Bdge | dcBG TA2 G2 :: g2 ag/a/ bggd | edef gdBG | 
 g2 ag/a/ bggd | edcB B2 A2 | bgaf gfed | egfa gdBG | GBAc Bdge | dcBG TA2 G2 :|  