Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
Q:1/4=120
M:6/8
K:Cmin
['c B>AG GAF E C3 z D', 'fdc B G3 z G c>de fde', 'c BAG FG=B c3-']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:Cmin
"^Moderate" c | B>AG GAF | E C3 z D | EFG |1 G=A=B | c3- c2 :|2 FED | C3- C2 |] (c/d/) | e>de fdc | 
 B G3 z G | c>de fde | f3- f2 f || (efg){g} fed | e c3 z c | BAG FG=B | c3- c2 |]  