Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/16
M:3/8
K:G
['GB d2d2d2 d2>g2dB dcBcec A4 dc B2G2G2', 'dB [AF]2[AF]2 dB'  
X:1
L:1/16
M:3/8
K:G
 GB | d2d2d2 | d2>g2dB | dcBcec | A4 dc | B2G2G2 | A2>B2cA | GFEDEF | G4 :: dB | [AF]2[AF]2 dB | 
 [AF]2[AF]2 dB | [AF]2[AF]2 dB | A4 GB | d2d2d2 | d2>g2dB | dcBcec | A4 dc | B2G2G2 | A2>B2cA | 
 GFEDEF | G4 |]  