Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:4/4
K:G
['B2 B>G', 'g2 f2 dc B>cde =fdd>c BG G2'  
X:1
L:1/8
M:4/4
K:G
 B2 B>G c>dc<G | B2 B>G cAF>A | B2 B>G c2 B>c | dgg>f g2 :| f2 dc B>cde | =fdd>c BG G2 |1 
 g2 dB c2 B>c | dgg>f g2 :|2 B2 (3BAG c2 (3ABc | dgg>f g2 ||  