Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:C
['BEA |[M:6/8][K:G]SOSOO .!fermata!PMTuCOMd/c/ BAG GFG D2 E{G}', 'BAG GFG AFD (TGFG) BGB c2 A', 'c ded d2 c BAG FGA cAG']  
X:1
L:1/8
M:4/4
K:C
 BEA |[M:6/8][K:G]SOSOO .!fermata!PMTuCOMd/c/ | BAG GFG | D2 E{G} FEF | GAG GAB |{d} cAG FGA | 
 BcB{c} BAG | ABA ABc | dcA{B} AGF | G3 G2 :: D | (TGFG) BAG | GFG AFD | (TGFG) BGB | 
{d} c2 A F2 A | (TGFG) BAG | E.FG ABc | dcA{B} AGF | G3 G2 :: D | G2 A B2 c | ded d2 c | 
{c} BAG FGA | cAG F2 A | BcB{c} BAG | ABA ABc | dcA{B} AGF | G3 G2 :|  