Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
Q:3/8=120
M:9/8
K:G
['B2 d']  
X:1
L:1/8
Q:3/8=120
M:9/8
K:G
 B2 d dBG dBG | c2 e (ef)g f2 A | B2 d def efg | D2 G GAB A2 G |:  