Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/4
M:3/4
K:Eb
['A G']  
X:1
L:1/4
M:3/4
K:Eb
 E G A | B3/2 c/ B | A G F | G2 E | E G A | B3/2 c/ B | A G F | G2 E | F F G | A3/2 B/ A | G G A | 
 B3/2 c/ B | A G F | F2 E |]  