Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:3/4
K:D
["dd' c'=c' ba (fd AF) D2"]  
X:1
L:1/8
M:3/4
K:D
"D" dd' c'=c' ba | (fd AF) D2 |"A7" A,C Ac g2 |"D" fc dF A2 | dd' c'=c' ba | (fd AF) D2 | 
"A7" GA ce ac' |"D" d'2 z2 z2 ::"A7" ag c'c eg |"D" af d'A df |"A7" c'^g ae =gc |"D" df ad' f2 | 
"A7" ag c'c eg |"D" af d'A df |"A7" ec' a^g =gc |"D" d2 z2 z2 :|  