Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:Ador
['G2 E', 'B a3 efg aga bge gfg gfe', 'FG Ac Gc Ad', 'd2 dA', 'GBEG BEGB AGFE D2 AG FADF ADFA', 'f g2 fg edBc']  
X:1
L:1/8
M:6/8
K:Ador
|: AGE G2 E | G2 E G2 E | A2 B c2 d | e2 d efg | e3 dBA | BAG Bcd | edc BAG | B2 A A2 B :: a3 efg | 
 aga bge | gfg gfe | dBA [GG][GB][Gd] | [Ee][fA][gA] [Dd][Ae][Ad] | BAG Bcd | edc BAG | 
 B2 A A2 B :|[M:4/4][K:Ddor]"^2 Windy Gap or Tuttles" A,D DE FE FG | Ac Gc Ad d2 | A,D DE FE FG | 
 AF GE FD D2 | A,D DE FE FG | Ac Gc Ad de | fd ec dc AB | cA GE ED D2 :| d2 dA c2 cA | 
 d2 dA cA GA | d2 dA cd cA | EF GE ED D2 | d2 dA c2 cA | d2 dA cA GA | fd ec dc AB | cA GE ED D2 :: 
[M:4/4][K:Edor]"^3 Frankenstein" E2 BE GBEG | BEGB AGFE | D2 AG FADF | ADFA BAGF | E2 BE GBEG | 
 BEGA B3 c | d2 cd B2 AF | GBAF G E3 :: Beef e3 f | g2 fg edBc | dA A2 eA A2 | f2 fe dcBA | 
 Beef e3 f | g2 fg edBc | d2 cd B2 AF | GBAF G E3 :|  