Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
Q:1/8=128
M:4/4
K:D
['gf eg fe df']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:D
|: de | fg fe de dB | A2 F2 F2 FE | DF Ad gf ed | cd ef e2 de | fg fe de dB | A2 F2 F2 FE | 
 DF Ad c2 Bc | d2 d2 d2 ef | gf eg fe df | ed ce Ad fa | gf eg fe df | e2 a2 a2 ef | gf eg fe df | 
 ed ce dc Bd | cB Ac BA ^GB | BA ^GA Bc de :|  