Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
Q:1/8=180
M:4/4
K:Emin
['gf eB B2 BE E2', 'efga bage fd d2 ad d2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:Emin
 gf | eB B2 BE E2 | GFGA (3B^cd gf | eB B2 BE E2 | (3B^cd AF E2 gf | eB B2 BE E2 | GFGA (3B^cd gf | 
 eB B2 BE E2 | (3B^cd AF E3 z || efga bage | fd d2 ad d2 | efga bgeg | fedf eB B2 | efga bage | 
 fd d2 ad d2 | g2 fg fedf | edBd efgf ||  