Construct a music composition that complies with the designated structure and theme.
X:1
L:1/4
Q:1/4=120
M:4/4
K:G
['D G', 'B2 c4 B3/2 A/ G c A3'  
X:1
L:1/4
Q:1/4=120
M:4/4
K:G
"^A" D G D G | F E F E | D G D G | F G A2 | D G D G | F E F E | D D E F | G2 G3/2 A/ ||"^B" B2 B2 | 
 c4 | B3/2 A/ G c | A3 A | B2 B2 | c3 c | B G A F | G2 G2 ||  