Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:4/4
K:G
['G2 ge d2 ed', 'edBA B2 e2 efge fgaf g2']  
X:1
L:1/8
M:4/4
K:G
 G2 ge d2 ed | B2 ge dBAB | G2 ge d2 ed |1 BGAG EFGA :|2 BGAF G2 z2 |: B2 e2 efge | fedf edBA | 
 B2 e2 efge | fgaf g2 z2 :|  