Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:Emin
['', 'G2 GB GABA']  
X:1
L:1/8
M:4/4
K:Emin
 A2 |:"^em" BeeA Beed | Beed"G"BAAG | FAAB BAFA |"D" FDDE"^hm"FBBc |"^em" BeeA Beed | Beed"D"BAAF | 
"G" G2 GB GABA |"D" AGFG"^em" E2 :| FA |:"^em" Beef edBA | (3Bcd ef"A"gefe |"D" d2 ce dcBA | 
"^em" (3Bcd ef"A"gefe |"^em" Beef edBA | (3Bcd ef gedB |"G" G2 GB GABA |"D" AGFG"^em" E2 :|  