Compose a piece using the specified musical pattern based on the alphabet notation and provided melodic motif.
X:1
L:1/8
M:2/4
K:C
['GA B2 A/B/A/B/ GB Bd BG', 'A2 GA B2 A/B/A/B/ GG Bd BG']  
X:1
L:1/8
M:2/4
K:C
 GA B2 | A/B/A/B/ GB | Bd BG | B2 A2 :: GA B2 | A/B/A/B/ GG | Bd BG | A2 G2 :|  