Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
Q:1/4=120
M:3/4
K:Gmix
['G/A/B/c/ dG d2 fc cF A/B/c/A/ G/A/B/c/', "BG b>g c'>a bg c'a af a/b/c'/a/"]  
X:1
L:1/8
Q:1/4=120
M:3/4
K:Gmix
 G/A/B/c/ dG d2 | fc cF A/B/c/A/ | G/A/B/c/ dB d2 | gd dc BG :| b>g c'>a bg | c'a af a/b/c'/a/ | 
 bg a/b/c'/a/ d'/c'/b/a/ | gd dc BG :|  