Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:6/8
K:A
['c2 d e2', 'bge f2 g aec d2 f eca']  
X:1
L:1/8
M:6/8
K:A
 c2 d e2 f | (ecA) (fdB) | c2 d e2 a | (ecA){c} B3 | c2 d e2 f | ecA fdB | cde fed |{c} TB3 A3 :: 
 g2 a bge | f2 g aec | d2 f eca | ecA{c} B3 | gba bge | fag aec | def edc |{c} TB3 A3 |]  