Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['G2 BG DGBG', 'G2 gf']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 G2 BG DGBG | BcBA B2 AF | G2 BG DGBG | AFDF AcBA | G2 BG DGBG | BcBA (3Bc^c d2 | efed (3B^cd ef | 
 gedB AcBA :| G2 gf ef g2 | BcBA B2 AF | G2 gf efgf | agfe dcBA | G2 gf ef g2 | BcBA (3Bc^c d2 | 
 efed (3B^cd ef | gedB AcBA :|  