Develop musical compositions in alignment with the designated form and the offered musical notion.
X:1
L:1/8
M:2/4
K:Bbmin
['c2 B2 B2', 'd3 A'  
X:1
L:1/8
M:2/4
K:Bbmin
 c2 B2 B2 fe | dc d2 e2 A2 | c2 B2 B2 fe | dc d2 e2 A2 | c2 B2 B2 fe | dc d2 e2 A2 | c2 B2 B2 e2 | 
 B4 B4 :: fgab agfe | d3 A d>ecA | c2 B2 BAfe | d3 A decA | fgab agfe | d3 A decA | cBBA e2 A2 | 
 B4 B4 :|  