Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
M:2/4
K:G
['DG B>B cc B2 BA A>B', 'G2 dd dB cc B2 BA A>B'  
X:1
L:1/8
M:2/4
K:G
 DG B>B | cc B2 | BA A>B | AG G2 :| dd dB | cc B2 | BA A>B | AG G2 :|  