Create musical compositions adhering to the given structure and incorporating the provided musical concept.
X:1
L:1/8
M:2/4
K:D
['ef/e/ ce fe', 'dB BA'  
X:1
L:1/8
M:2/4
K:D
|:"D" FA/A/ BA | de f2 |"A7" fe/f/ gc |"D" ed"^(A)" BA |"D" FA/A/ BA | de f2 |"A7" fe/f/ gc | 
"D" ed d2 ::[K:A]"A" ef/e/ ce | fe a2 | ef/e/ ce | fe c/B/A |"A" ef/e/ ce | fe a2 |"E7" ef/e/ dB | 
"A" BA A2 :|  