Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:2/2
K:G
['GFGB dgfg e2 ce dBGB cBAc BAGB', "abc'b agfe", '', 'GFGA Bddg ecce dBGB cBAc BAGB AGFA', '(3AB^c defg afdf afbf agfe defg afbf']  
X:1
L:1/8
M:2/2
K:G
 BA | GFGB dgfg | e2 ce dBGB | cBAc BAGB | ADFA dBcA | GFGB dgfg | e2 ce dBGB | cBAc BAGB | 
 ADFA G2 :: ge | d^cdf afdf | abc'b agfe | defg abc'b | agfe dcBA | GFGB dgfg | e2 ce dBGB | 
 cBAc BAGB | ADFA G2 :|"^Variations:" |: (3DEF | GFGA Bddg | ecce dBGB | cBAc BAGB | AGFA dcBA | 
 GFGA Bddg | ecce dBGB | cBAc BAGB | AGFA G2 :: (3AB^c | defg afdf | afbf agfe | defg afbf | 
 (3aba (3gfe (3ded (3cBA | GFGA Bddg | ecce dBGB | cBAc BAGB | AGFA G2 :|  