Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:3/4
K:Fmix
['F>G AB cd e3 d/e/', 'cA F>G']  
X:1
L:1/8
M:3/4
K:Fmix
 e/d/ cA | F>G AB cd | e3 d/e/ cA | F>G AF BB | B3 e/d/cA | F>G AB cd | e3 d/e/ cd | B>A FG/A/ FF | 
 F3 || BBc | f2 BA/B/ cd | e3 d/>e/ cA | F>G AF BB | B3 e/d/ cA | F>G AB cd | e2 de cA | 
 B>A FG/A/ FF | F3 ||  