Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:3/4
K:D
['B2 GB GB', 'gf fe']  
X:1
L:1/8
M:3/4
K:D
|: A de | f2 f^e fg | f/g/f e/f/e dc | B2 GB GB | A/B/A- Ad cd | B2 GB GB | A/B/A FA de | 
 f/g/f gf e^d | e3 A de | f2 af ef | d/e/d f/e/d cd | B2 gB dB | A3 d cd | B2 GB GB | A/B/A FA FA | 
 f/g/f ge ce | d3 ::[K:Dmin] A de | f2 fd gf | fe ^ce Ae | dA df ed | ^cA ce ae | f2 f/e/d gf | 
 fe ^ce A2 | d3 f e/d/^c | da ^ga b/a/g | f3 a gf | fe ae ^cA | dA FA ed | ^c2 cA ag | fa gf ed | 
 ^ce ab a2 | ^c3 e a<c | d3 :|  