Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:2/4
K:G
['dd/e/ dd/e/']  
X:1
L:1/8
M:2/4
K:G
 dd/e/ dd/e/ | dgB z | ccBB | Add z | dd/e/ dd/e/ | dgB z | ccBB | Add z | db/a/ gd | dc'/b/ ad | 
 db/a/ gd | dc'/b/ ad | dd/e/ dd/e/ | dgb z | aa g/f/e/f/ | gbg z | dd/e/ dd/e/ | .d.b"_>" g2 | 
 .d.c'"_>" a2 | .d.b"_>" g2 | dd/e/ dd/e/ | db g2 | dd' c'>f | g3 z |]  