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:D
['fA BA']  
X:1
L:1/8
M:2/4
K:D
|:"D" fA BA | fA BA |"G" d2 e>f |"A" ed BA |"D" fA BA | fA BA |"G" d2"A" e>f |"D" ed d>e :: 
"D" fa fe | ed BA |"G" d2 e>f |"A" ed BA |"D" fa fe | ed BA |"G" d2"A" e>f |"D" ed d>e :|  