Create music compositions that adhere to the given structure and incorporate the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['B2 c/B/^A/B/', 'fA fA aA fA gA', 'B2 b2 ag f2 z2 c3 d'  
X:1
L:1/8
M:2/4
K:D
 D | B2 c/B/^A/B/ | G2 D2 | B2 c/B/^A/B/ | ed cB | A2 B/A/^G/A/ | F2 D2 | A2 B/A/^G/A/ | fe dc | 
 B2 c/B/^A/B/ | G2 D2 | B2 c/B/^A/B/ | ed cB | A2 B/A/^G/A/ | f3 e | dc BA | G2 z ::[K:D] A | 
 fA fA | aA fA | gA eA | fA dA | fA fA | aA fA | gA Bc | d2 z ::[K:G] d3 e | d2 B2 | b2 ag | 
 f2 z2 | c3 d | c2 A2 | fe dc | B3 z | d3 e | d2 B2 | e3 f | e2 c2 | f3 f | (3fed (3cBA | 
 G2 [Bg]2 :|  