Craft a musical composition adhering to the specified musical framework in language.
Only One Section  
X:1
L:1/8
M:3/4
K:Bb
 F2 | FB B3 c | cd d3 B | cd e2 d2 | c3 z F2 | FB B3 c | cd d3 B | dc B2 A2 | B4 |]  