Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:2/2
K:G
['GBdg ec Tc2 dBAc BG TG2 GBdg', 'GB/c/ dB']  
X:1
L:1/8
M:2/2
K:G
 GBdg ec Tc2 | dBAc BG TG2 | GBdg gfbg | fed^c d2 D2 :: GB/c/ dB Gc/d/ ec | GB/c/ dB cA TA2 | 
 GB/c/ dB dgfg | (3dBG (3cAF G2 G,2 :|  