Develop a musical piece using the given motif and adhere to the outlined structure.
X:1
L:1/8
Q:1/8=300
M:6/8
K:none
['', 'F>BB B2', 'afg a2'  
X:1
L:1/8
Q:1/8=300
M:6/8
K:none
[K:D]|: F | F>BB B2 B | dcd fed | cAA eAA | ced cBA | F>BB B2 c | def b2 a | fed cde | fef B2 :: 
 f/g/ | afg a2 b | afg a2 A | ABA cBA | ced cBA | F>BB B2 c | def b2 a | fed cde | fef B2 :|  