Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:2/4
K:D
['a(a/b/) a(f/a/)', 'GA F(E/D/) =CD FA GA']  
X:1
L:1/8
M:2/4
K:D
 a(a/b/) a(f/a/) | g(e/g/) fA | a(a/b/) a(f/a/) | ge/=c/ d2 | a(a/b/) a(f/a/) | g(e/g/) fA | 
 a(a/b/) a(f/a/) | ge/=c/ d>(f |: g)f d>=c | A(=c/B/) GA | F(E/D/) =CD | FA GA | F(E/D/) =CD | 
 FA GA | f>e d=c |1 d2 d>f :|2 d2 d2 |]  