Construct a piece of music using the designated motif as the basis, while ensuring the required form is followed.
X:1
L:1/8
M:2/4
K:D
['ag fgfe dedB ABAF DFED CDEF', 'efec efec'  
X:1
L:1/8
M:2/4
K:D
 ag | fgfe dedB | ABAF DFED | CDEF GEFE | DEFG A2 ag | fgfe dedB | ABAF DFED | CDEF GABc | 
 d2 de d2 :|[K:A] cd | efec efec | efec AcBA | GABc dBcB | ABcd e2 cd | efec efec | efec AcBA | 
 GABc defg | a2 ab a2 :|  