Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:D
['d2 cA A2']  
X:1
L:1/8
M:4/4
K:D
|:"D" Adfd"A7" e2 ce |"D" fdfd"G" g2 eg |"D" fdfd"A7" e2 ce |"G" d2 ed"A7" cA A2 :: 
"D" fgaf"A7" gagf |"C" e=cgc ecgc |"D" fgaf"A7" gece |"G" d2 ed"A7" cA A2 ::"D" Adfd"A7" e2 ce | 
"D" fdfd"G" g2 eg |"D" fdfd"A7" e2 ce |"G" d2 ed"A7" cA A2 ::"D" fgaf"A7" gagf |"C" e=cgc ecgc | 
"D" fgaf"A7" gece |1"G" d2 ed"A7" cA A2 :|2"G" d2 ed"A7" cA :|  