Create musical compositions adhering to the given structure and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['aA z a', 'A2 a/g/f/g/ f z eA z g', 'dATBA d>efe d2 ef |{a}'  
X:1
L:1/8
M:2/4
K:D
 d/e/f/g/ .a.a | a/b/a/g/ fa | g/a/g/f/ eg | fa/f/ d2 | aA z a | aA z a | e2 e2 | ae A2 :: 
 a/g/f/g/ f z | eA z g | g/f/e/f/ e z | fD z2 | d'>zd'>a | d'a g/f/e/d/ | eg/e/{d} cB/A/ | 
 d/c/d/e/ d2 :| Td>efe | dATBA | d>efe | d2 ef |{a} g{f}e{g}f{e}d |{d} c{B}Aef |{a} g{f}e{g}f{e}d | 
 eA/B/ A/G/F/E/ | d>efe | dATBA | d>efe | d2 ef |{a} gf/e/{g} fe/d/ |{d} c{B}Adf- | f/B/g/e/ dTc | 
 d4 ||  