Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:4/4
K:D
['gfed cdef', 'd2 a3 g/a/ bagf g3 g/>g/ agfe']  
X:1
L:1/8
M:4/4
K:D
 f3 (3e/e/f/ gfed | cdef dA/A/ F/>F/A | f3 e/f/ gfed | cdef d2 d2 :: a3 g/a/ bagf | g3 g/>g/ agfe | 
 f3 e/>f/ gfed | cdef d z z2 :|  