Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/16
Q:1/4=100
M:2/4
K:A
['a2a2 A2zB cdec', 'ce z e eecA']  
X:1
L:1/16
Q:1/4=100
M:2/4
K:A
 (3(efg) | a2a2 A2zB | cdec A2zf | =g2g2 G2zA | B=cdB =G2z^g | a2a2 A2zB | 
 cdec A2 (3(BAG)Ac (3(efg) aefd | cABG A2 :: A2 | ce z e eecA | ce z e eecA | Bd z d ddB=G | 
 Bd z d ddB=G | ce z e eecA | ce z e eecA | Ac (3(efg) aefd | cABG A2 :|  