Craft a musical composition with the supplied motif and conforming to the necessary format.
X:1
L:1/8
M:12/8
K:G
['B3 cBc', 'DFG AGF G3'  
X:1
L:1/8
M:12/8
K:G
|: B3 cBc dAF G3 | B3 cBc dAF G3 | B3 cBc def g3 |1 agf def g3 gdc :|2 agf def g3 gbc' |: 
 bag agf gdc BAG | de/f/g agf g3 gbc' | b{c'}bg a2 f gdc BAG |1 DFG AGF G3 G>fg/a/ :|2 
 DFG AGF G3 G2 A ||  