Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/4
K:C
['ec B2 d2 G2', 'df ee c2 G2']  
X:1
L:1/8
M:2/4
K:C
 G | c2 ec | B2 d2 | G2 (Bc) | dg BG | cc ec | B2 d2 | G2 (AB) | c3 || c | (fe) df | ee c2 | 
 G2 (Bc) | dg (BG) | fe df | ee c2 | G2 (AB) | c3 ||  