Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:2/2
K:D
['(3(ABc) d2 D2 D2 (AG) FAdc defd', 'f2 gfga bagf gfec dcBA Bdce dfeg', 'd2 (AG) FAdA FAdA B2 G2 G2', '(ef) gfga bagf gfec dcBA Bdce dfeg']  
X:1
L:1/8
M:2/2
K:D
 (3(ABc) | d2 D2 D2 (AG) | FAdc defd | e2 E2 E2 (ed) | cea^g a2 f2 || gfga bagf | gfec dcBA | 
 Bdce dfeg | f2 d2 d2 :: (AG) | FAdA FAdA | B2 G2 G2 (GF) | GBeB GBed | c2 A2 A2 (ef) || 
 gfga bagf | gfec dcBA | Bdce dfeg | f2 d2 d2 :|  