Construct a musical piece that integrates the provided motif and corresponds to the indicated musical structure.
X:1
L:1/16
M:2/4
K:C
['A8 z8']  
X:1
L:1/16
M:2/4
K:C
"^Fritt, utan taktbundenhet -- lat resonansen ljuda" a4 e4 | A8 | z8 | a4 e4 | A8 | z8 | g6 ag | 
 f2 e4 d^c | e6 ef | d4 A2^c2 | d8 | z8 |[M:3/4] f6 gf edef |[M:2/4] e4 ^c4 | A8 | z8 | g6 ag | 
 f2 e4 d^c |[M:3/4] e4 f4 d4 |[M:2/4] A4 ^c4 | d8 | z6 A^c | e4 f4 | d4 B4 | c8 | z6 A^c | 
 e2f2 d4 | A4 ^c4 | d8 |]  