Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:F
['FD C3']  
X:1
L:1/8
M:4/4
K:F
 FD | C3 D F2 (GA) | B3 A G2 (FG) | (AG)(FD) C3 C | C6 | FD | C3 D F2 (GA) | B3 A G2 (FG) | 
 (AG) FD C3 C | C6 | AB | c2 c2 d3 c | B2 B2 B3 A | G3 G(GA)(cA) | G6 F (D) | 
 (C3) (D) (F2) (G) (A) | (B3) (A) G2 FG | AGFD C3 C | C6 ||  