Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=120
M:4/4
K:Gmin
['vD2 G2 GABG FGAB cAFA D2 G2', 'B2 (dB) fBdB']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Gmin
|:"^Reel." vD2 G2 GABG | FGAB cAFA | D2 G2 GABc | dcBA BGGB :| B2 (dB) fBdB | cdcB AFGA | 
 B2 (dB) fBdB | dgg^f g2 (ga) | bag^f gdd=e | fdcB AFFA | D2 G2 GABc | dcBA (BG) G2 |]  