Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/4
M:4/4
K:D
['', 'A d d', 'F D']  
X:1
L:1/4
M:4/4
K:D
 A/G/ |: F A G B | A f f/a/f/d/ | B e e/f/e/c/ |1 A d d A/G/ :|2 A d d f/e/ |: d B B/c/d/B/ | 
 A F F3/2 A/ | G E E/F/G/E/ |1 F D D f/e/ :|2 F D (D D) ||  