Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['b>ag (d<B)d', "d' b2 (d' a2) (d' g>)ag fed"  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 g/a/ | b>ag (d<B)d | ece (d<B)(g/a/) |({ga)} b>ag (d<B)d | eaf g2 :| d' | b2 (d' a2) (d' | 
 g>)ag fed | b2 d' a2 d' |{g} ^c'bc' d'2 d' | e'>d'e' d'>bd' | c'>ac' b(ga) |{ga} b>ag (d<B)d | 
 eaf !fermata!g2 :|  