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 f z A F2 A B']  
X:1
L:1/8
M:2/4
K:D
 B2 f z | A F2 A | B f A2 | B4 | B2 f z | A F2 A | B f A3/2 F/ | E4 |]  