Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/16
M:2/4
K:D
['fe d2D2 D2AG FAd2 d2fd e2E2E2 ed', 'f2d2d2 AG FAdA FAdA B2G2 G2BA ^GBeB']  
X:1
L:1/16
M:2/4
K:D
 fe | d2D2 D2AG | FAd2 d2fd | e2E2E2 ed | cAce a2bc' d'c'ba bagf | gfed edcB | Adce dfeg | 
 f2d2d2 :: AG | FAdA FAdA | B2G2 G2BA | ^GBeB GBeB | c2A2A2 .=g.=f | .g2.b2 bagf | gfed edcB | 
 Adce dfeg | f2d2d2 :|  