Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
M:4/4
K:G
['G/A/B/c/ dg dBBg', 'G/A/B/c/ dB'  
X:1
L:1/8
M:4/4
K:G
 G/A/B/c/ dg dBBg | dBBg d2 B2 | G/A/B/c/ dg dBBg | gAAB c2 BA | G/A/B/c/ dg dBBg | dBBg d2 B2 | 
 G/A/B/c/ d/e/g/e/ d/c/B/d/ B/c/d/f/ | gAAB c2 BA :: G/A/B/c/ dB ecdB | G/A/B/c/ dG d2 cB | 
 G/A/B/c/ dB ecdB | eAAB c2 BA | G/A/B/c/ dB ecdB | G/A/B/c/ dB c2 BA | 
 G/A/B/c/ d/c/B/d/ e/d/c/e/ d/c/B/d/ | eAAB c2 BA :|  