Using the provided alphabet sequence and motif, develop a unique musical composition.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['g2 d BGB c2 A FDF GBd', 'ecA dBG']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 g2 d BGB | c2 A FDF | GBd Gce | ABG FED | g2 d BGB | c2 A FDF | GBd Gce | def g3 :: AFD BGD | 
 cAF dBG | ecA dBG | ABG FED | FAc GBd | Ace dfg | ecA dBG | cAF G3 :|  