Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/4
M:4/4
K:F
['A G']  
X:1
L:1/4
M:4/4
K:F
 A | G F G A | B A G A | G F E F | G2 F A | G F G A | B A G A | G F E F | G2 F F | G A B A | 
 G F G A | G F E F | G2 F F | D E F F | G A F A | G F E F | G2 F |]  