Develop a tune that adheres to the given musical structure.
'Binary', 'Sectional: Verse/Chorus'  
X:1
L:1/8
M:2/4
K:Bb
 dc | B2 A2 | B2 ed | c2 B2 | c2 fe | d2 c2 | d2 cB | (AB) cA | B2 :: !3!f2 | fe de | f2 !2!b2 | 
 !1!abc'a | bc'd'b | fede | f2 b2 | abc'a | b2 :|  