Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:2/4
K:Bb
['F2 f2', 'd2 c2', 'c2 d3 c B2 DF BD FB'  
X:1
L:1/8
M:2/4
K:Bb
"^A" DF Bc | d3 c | B2 F2 | f2 ed | (c4 | c4) | EF Ac | e3 d | c2 F2 | f2 dc | (B4 | B4) | DF Bc | 
 d3 c | B2 F2 | f2 ed | c4 | c2 e2 | d3 B | F2 d2 | c2 d2 | !fermata!B4 ||[M:2/4]"^B" FD | E2 d2 | 
 c2 dc | B2 D2 | F2 Bd | f3 e | d2 c2 | B2 d2 | F2 FD | E2 d2 | c2 dc |"^rit." B2 A2 | G2 Bc | 
 d2 B2 | F2 c2 | (B4 | B2) ||[M:2/4]"^C" FF | e3 d | c2 f2 | e2 c2 | d3 c | B2 DF | BD FB | A3 B | 
 c2 EF | AE Fc | B3 c | (d4 | d2) FF | e3 d | c2 f2 | =e2 c2 | d3 c | B2 DF | BD FB | A3 B | 
 c2 F2 | d2 c2 | !fermata!B4 ||  