Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
Q:1/2=60
M:2/2
K:D
['AG FDAF']  
X:1
L:1/8
Q:1/2=60
M:2/2
K:D
|: (D/E/F/G/) AG FDAF | =C3 c ECGE | D/E/F/G/ AG FDAF | E=C cE D/D/D D2 |:  