Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
['C2 c2 c2 Bc dBGB c2 cd', 'G2 ef']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
 GE | C2 c2 c2 Bc | dBGB c2 cd | ecec fdfd | gece dBGE | C2 c2 c2 Bc | dBGB c2 cd | ecec BAG^F | 
 G2 G2 G2 :: ef | gfed cBAG | A2 F2 F2 fg | agfe dcBA | B2 G2 G2 ef | gege afaf | gege afaf | 
 geaf ecdB | c2 c2 c2 :|  