Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:6/8
K:Bb
['(B>cB) FDF', 'B3 fdb fdB egB AGF Egg Dff']  
X:1
L:1/8
M:6/8
K:Bb
 (B>cB) FDF | (B>dB) cec | (B>cB) FDF | GeA B3 :: fdb fdB | egB AGF | Egg Dff | ecA B3 :|  