Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:2/4
K:F
['ca/a/ cf/f/ eg/g/ ce/g/ cb/b/', 'gg c2 bb aa f2'  
X:1
L:1/8
M:2/4
K:F
"F" ca/a/ cf/f/ |"C7" eg/g/ ce/g/ | cb/b/ ce/g/ | cb/b/"F" b/a/f | ca/a/ cf/f/ |"C7" eg/g/ ce/g/ | 
 cb/b/ cd/e/ |"F" ff f z ||"C7" f>e e.b | d3 e |"F" f>f af | d>c c2 |"C7" f>e eb | d3 e | 
"F" f>f ac | AB c2 |"C7" f>e eb | d3 e |"F" f>f ac | d>c c2 | a2 fe |"C7" d c3 | dd ce | 
"F" ff f z ||"F" aa"C7" gg | c2 bb |"F" aa f2 |"C7" ef gg | c2 bb |"F" aa f2 | cf cf | z a a/a/a | 
 fb af |"C7" gc"F" f2 |]  