Develop a musical piece using the given motif and adhere to the outlined structure.
X:1
L:1/8
M:6/8
K:F
['fff c2 c fff A2 A ccc', 'F2 z'  
X:1
L:1/8
M:6/8
K:F
 fff | c2 c fff | A2 A ccc | G2 B A2 G | c2 z fff | c2 c fff | A2 A ccc | G2 B A2 G | F2!fine! z || 
 F2 A | c2 d c2 A | F2 z FFF | G3 GFG | (A2 F) F2 A | c2 d c2 A | F2 z FEF | G2 B A2 G | 
 F2 z fff |]  