Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:4/4
K:D
['d2 ef g2']  
X:1
L:1/8
M:4/4
K:D
 de |"D" f2 ef d2 ef |"G" g2 fg"A" e2 de |"D" f2 de fed=c |"G" Bd"A" cA"D" d2 :: fg | 
"D" agfe d2 ef |"C" g2 fg e2 de |"D" fed=c"G" B2 gf |"A" edce"D" d2 :|  