Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
['F2 A', 'A F2']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
 C |[K:D] !fermata!ad f ae !>!a A,2 E F2 A | d2 f ecA | G2 B F2 A | E2 d AFD | A,2 E F2 A | 
 d2 f ecA | B2 g edc | d3 D3 :: a2 f d2 A | F2 f a2 f | g2 e c2 A | E2 f gfe | a2 f d2 A | 
 F2 A d2 A | B2 g edc | d3 D3 :|  