Construct a music composition that complies with the designated structure and theme.
X:1
L:1/8
M:4/4
K:Bb
['A (cB) (AG)']  
X:1
L:1/8
M:4/4
K:Bb
 (B>c) | d3 c B3 A/ | .c.B (AG) F3 F | F3 B B2 (cd) | c4 z2 (Bc) | d2 c2 B3 A | (cB) (AG) F3 F | 
 G B3 (ABc) d | B4 z2 B2 | c3 A F2 z F | d3 B F2 z d | e2 (dc) d3 B | c6 (B>c) | d3 c B3 A | 
 (cB) (AG) F2 F3/2 F/ | G B2 G (AB) (cd) | c6 f3/2 f/ | f3 d d3 c |{A} G6 G2 | e3 d c3 B | 
{A} F3 F | G3 A (cB) (AG) | F B2 !fermata!d3 [BF]3/2 A/ | (G B2) G (AB) (cd) | c6 z2 |]  