Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:2/4
K:G
['D GDB,D B>AGB A>GFG/B/ A2 z F/G/']  
X:1
L:1/8
M:2/4
K:G
 D | GDB,D | B>AGB | A>GFG/B/ | A2 z F/G/ | AAAc | B>A G2 | A2 Ac | B/A/B/A/GG | EGF/F/A | G2 z |]  