Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:6/8
K:Edor
['GEE E2', 'edB def', 'def g2', 'edB def gba gfe dBA BGE E3', 'edB def', 'gef gef', 'GED E2']  
X:1
L:1/8
M:6/8
K:Edor
 BEE dEE | BAG FGE | DED FDF | ABc ded | BEE BAB | def g2 e | fdB AGF |1 GEE E2 A :|2 GEE E2 B |: 
 efe edB | g2 e fdB | ded dAF | DFA def |1 efe edB | def g2 a | bgb agf | gee e2 d :|2 edB def | 
 gba gfe | fdB AGF | GEE E2 A |:"^variations" BEE dEE | BAG FGE | D2 D FDF | ABc dcd | BEE BAB | 
 def g2 e | fdB AGF |1 GEE E2 A :|2 GEE E2 d |: e3 edB | ege fdB | ded dAF | DFA def |1 efe edB | 
 def g2 a | bgb afa | gee e2 d :|2 efe edB | def gba | gfe dBA | BGE E3 |: 
"^four part version" BEE dEE | BAG FGE | D3 FDF | ABc d2 c | B3 BAB | def gfe | fdB AGF |1 
 GED EFA :|2 GED E2 B |: efe edB | g3 fdB | ded dAF | DFA def |1 efe edB | def g2 a | bgb afa | 
 ged e2 d :|2 edB def | gba gfe | fdB AGF | GED EFA |: BdB cec | ded BAF | D3 FDF | ABc ded | 
 BdB cec | def gfe | def g2 a |1 bge edc :|2 bge e2 f |: gef gef | gef gfe | dfe d2 A | def def | 
 edB def | gba gfe | fdB AGF |1 GED E2 f :|2 GED E2 A ||  