Compose a piece of music using the provided motif and follow the designated alphabet character structure.
X:1
L:1/4
M:4/2
K:F
['A2 A2']  
X:1
L:1/4
M:4/2
K:F
 F2 | c4 c2 F2 | c4 c2 _e2 | d2 c2 B2 A2 | B c d B c2 A2 | A2 A2 B2 B2 | c4 A2 A2 | B2 B2 c2 c2 | 
 A4 F2 F2 | B2 B2 G2 G2 | F6 |]  