Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
Q:1/8=90
M:6/8
K:C
['|{a} g^fg', 'Gce g3 a3 d3 z e2 fef', 'e def afd c3{dc} B2 g .g.e.g']  
X:1
L:1/8
Q:1/8=90
M:6/8
K:C
 g |{a} (g^f).g ecg |{a} g^fg =fdg |{a} g^fg a2 g | fdg dc :| G | GEc cBe | (d/e/d/c/B/A/) Gce | 
 g3 a3 | d3 z e2 | fef dag | g3 gfe | def agB | (d2 e/d/) c2 || g | g2"^&" e c'2 b | a2 g f2 e | 
 def afd | c3{dc} B2 g | .g.e.g .g.a.b | (c'b).a (ga).f | (eg).g (dg).g | c3- c2 ||  