Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/4
M:6/4
K:D
['(g a)', 'f (g']  
X:1
L:1/4
M:6/4
K:D
 d | (g a) f (g a) b | (g e) e (e f) g | (f d) B (c d) e | (c A) A (A G) F | (G d) c (B g) f | 
 (e B) (c A) a g | (f g) a c d e | e3 d2 :: a | (f g) a (d g) f | (g a) b (^d e) f | 
 (g B) b (a f) g | f3 e2 (f/g/) | (d B) G (F A) B | (c E) A (F D) d | (B d) g (e B) c | A3 G2 |]  