Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:4/4
K:C
['G2 z']  
X:1
L:1/8
M:4/4
K:C
 EEC | G3 GGGAG | G2 G2 z GAG | c3 GEEGE | D4 z DDD | G3 GGGAB | B2 A2 z AcA | G3 G^FGAB | 
 G4 z GGG | d3 dcBAG | c2 c2 z GAB | c2 E2 AGEC | D4 z GGF | E3 EFFED | A2 G2 z cBA | G3 EDDAG | 
 E4 z GGF | E3 EFFED | A2 G2 z cBA | G3 GAGFD | C4 z GGF | E3 EFFED | A2 G2 z cBA | G3 GAGED | 
 C4 z |]  