Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:2/4
K:G
['g/f/e/d/ gB dG BD c/B/A/G/', 'z/ d/ ggd z/ g/ bbd z/']  
X:1
L:1/8
M:2/4
K:G
 d | g/f/e/d/ gB | dG BD | c/B/A/G/ FA | GB dg | g/f/e/d/ gB | dG BD | c/B/A/G/ F/A/D/F/ | GGG :: 
 z/ d/ | ggd z/ g/ | bbd z/ f/ | aa g/f/e/f/ | gbd z/ d/ | ggd z/ g/ | bbd z/ f/ | aa g/f/e/f/ | 
 gbg :|  