Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/2
K:G
['G/A/B/ c>d cB/A/ B>A Bc/d/ e2 dB', 'b2 ag']  
X:1
L:1/8
M:2/2
K:G
 G/A/B/ | c>d cB/A/ B>A Bc/d/ | e2 dB A>GE>F | G2 g>f edBG | AGEE E3 || f | gfga{ga} b2 ag | 
 a>ga>b ag e3 f | gfga b2 ag | agee e2 ga | ba g3/2a/4b/4 a2 ge | dBde ga ga/b/ | 
 Bd c/B/A/G/ A>B e/d/B/G/ | AGEE E2 ||  