Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/2
K:D
['', 'F2 G2', 'ed (3cdc', 'B4 [EB]d ef']  
X:1
L:1/8
M:2/2
K:D
 A F2 G2 |: [DA]BAG F2 G2 | ABAF [DA]2 [Af]/g/f | [Ae]fed cA [ca]2 | abaf [Ag]2 ef | 
 [Ag]2 [Af]/g/f [Fd]2 [Af]2 |1 [Dd]3 A F2 G2 :|[M:2/4][M:2/2] [Dd]4 |: [Dd]2 ef gf ed | 
 (3cdc B2 B4 | [EB]d ef ga ge | (3fgf e2 a4 | a2 ef gf ed | (3cdc B2 B4 | [EB]d ef gf ed | 
 c2 ec d2 f2 |1[M:2/4] d4 :|2[M:2/2] [Dd]3 A F2 G2 ||  