Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:2/2
K:F
['f2 fe fagf']  
X:1
L:1/8
M:2/2
K:F
"Dm" dcAG F2 DF |"C" E2 CE"Dm" F2 D2 |"Dm" dcAG FDDF |"C" Addc defe |"Dm" dcAG F2 DF | 
"C" E2 CE"Dm" F2 D2 |"Dm" dcAG FDDF |1"C" Addc"Dm" d4 :|2"Am" Addc"Dm" d2 de |:"F" f2 fe fagf | 
"C" ec gc ac gc |"Bb" f2 fe fagf |"Am" edcB Adde |"F" f2 fe fagf |"C" ec gc ac gc | 
"Bb" fedf"Am" edcB |1"C" Addc"Dm" d2 de :|2"Am" Addc"Dm" d4 |]  