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
['ABcd efed ef g2', "ac'ba geef"]  
X:1
L:1/8
M:4/4
K:C
 BEA |[M:2/2][K:A]SOSOO .!fermata!PMTuCOMABAG ABcd | efed ef g2 | G2 BG dGBG | AcBA GEDG | 
 ABAG ABcd | efed ef g2 | afgf egfa | gedB TBA A2 || a2 bg a2 bg | ac'ba geef | g2 af g2 af | 
 gbag gfed | agbg agbg | ac'ba geef | gfed (3(efg) fa | gedB TBA A2 |]  