Develop an original musical piece that integrates the given alphabet sequence and motif.
X:1
L:1/8
Q:1/2=90
M:4/4
K:D
['d2 FG AFAF', 'f2 (df) dfdf']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:D
|: d2 (FG) AFAF | d2 FG AFAF | BAGF E2 (ef) | gfed c2 (A/B/c) | d2 FG AFAF | d2 FG AFAF | 
 BAGF E2 (eg) | fedc d4 :: f2 (df) dfdf | e2 (ce) cece | f2 (df) dfdf | edcB A2 (Bc) | dBdB cAcA | 
 dBdB cAcA | afge fdec | d2 d2 d4 :|  