Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
M:3/8
K:D
["d' a2", 'd2 eee fff gb/g/e/c/']  
X:1
L:1/8
M:3/8
K:D
 d' | a2 d' | a2 f | gb/g/e/c/ | d2 :: eee | fff | gb/g/e/c/ | d3 :|  