Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:6/8
K:F
['GAc cAF z CD FGA', "cfa bac'-"]  
X:1
L:1/8
M:6/8
K:F
 GAc cAF | z CD FGA | Ad/e/f ecG |{/G} AcG{/A} GFG | GAc cAF | z CD FGA | A2 A def | ecG GFF :: 
 gab c'af | cfa bac'- | c'af dcG |{/G} AcG{/A} GFG | cfa bac'- | c'ba fGA | Afa baf | cdG AcF :|  