Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['G2 BG BddB cBcd efge GBdG Bdgd', 'g2 (3aga bggd']  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 G2 BG BddB | cBcd efge | GBdG Bdgd | ecBc A2 G2 :| g2 (3aga bggd | edef gdBG | g2 (3aga bggd | 
 edcB A2 G2 | bgaf gfed | egfa gedB | GBAc Bdgd | ecBc A2 G2 |]  