Construct a musical piece that follows the designated lettered structure and integrates the provided motif throughout.
X:1
L:1/8
Q:1/4=34
M:3/4
K:Fmin
['C2 F2 F2 F>G A4 ec B2', 'f2 f2']  
X:1
L:1/8
Q:1/4=34
M:3/4
K:Fmin
 C2 | F2 F2 F>G | A4 ec | B2 G2 G>F | E4 FG | A2 A2 GF | E2 F2 B>G | G2 F2 F2 | F4 |: c2 | 
 f2 f2 f2 | g4 f2 | fe cB c=d | e4 f/e/c/>B/ | A2 A2 GF | E2 F2 B>G | G2 F2 F2 | F4 |]  