Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/4
M:3/1
K:G
['B4 c4']  
X:1
L:1/4
M:3/1
K:G
 c4 | c8 c4 | d8 d4 | B8 B4 | G8 e4 | e4 d4 B4 | c4 d4 d2 c2 | B2 A2 G4 A2 c2- | c2 A2 B4 c4 | z8 |]  