Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/16
Q:1/4=80
M:2/4
K:C
['F2A2A2 Bc dcde d2ef', 'de f2f2 gfed c2A2 A4']  
X:1
L:1/16
Q:1/4=80
M:2/4
K:C
 C |[K:D]"^79""_Key given as G major" AG | F2A2A2 Bc | dcde d2ef | g2f2e2d2 | cdec A2AG | 
 F2A2A2 Bc | dcde d2ef | gfed cdef | d2d2d2 :: de | f2f2 gfed | c2A2 A4 | B2B2 BcdB | A2F2 F4 de | 
 f2f2 gfed | c2A2 A4 | BcdB cdef | d2d2 d2 :|  