Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:3/8
K:F
['G GGG GGA BAG FFG BAA/A/ GGG']  
X:1
L:1/8
M:3/8
K:F
 G | GGG | GGA | BAG | FFG | BAA/A/ | GGG | FGA | GGG | GGc | cAF | B2 c | A2 A | G2 G | FFF | 
 BAG | F2 |]  