Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:G
['G2 DC B,B,B,D ECEG FDFA', 'G2 (3def gdBG DFAB cBcA GFED cdcA']  
X:1
L:1/8
M:4/4
K:G
 (3DEF | G2 DC B,B,B,D | ECEG FDFA | BGBG cBAG | F2 A2 A2 DF | G2 DC B,B,B,D | ECEG FDFA | 
 BGBd cBAF | D2 G2 G2 :: (3def | gdBG DFAB | cBcA GFED | cdcA BcBG | F2 D2 D2 GF | ECEG cBAG | 
 FDFA dcBA | Bgfg ecBA | B2 G2 G2 :|  