Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:2/4
K:D
['BB/B/ BB']  
X:1
L:1/8
M:2/4
K:D
"D" AA/A/ AA |"G" BB/B/ BB |"D" AA/A/ AF |"A7" E4 |"D" AA/A/ AA |"G" BB/B/ BB |"A7" Ac/c/ ec |1 
"D" d4 :|2"D" d3 |: A |"D" dd/d/ fA | d3 A |"D" dd/d/ cB |"A7" A3 A |"D" dd/d/ dd |"G" BB/B/ BB | 
"A7" Ac/c/ ec |"D" d3 :|  