Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/16
M:2/4
K:Ephr
['GFG2 EDEF FEF2 E4- E4', 'GFG2 E4-']  
X:1
L:1/16
M:2/4
K:Ephr
|:"Am" AGAF"G" GFG2 |"F" FEF2"Em" EDEF |"G" GFG2"F" FEF2 |"Em" E4- E4 ::"Am" EDEF"G" GFG2 | 
"F" FEF2"Em" E2AG |"Am" A2A2"G" GFG2 |"F" FEF2"Em" EDEF |"G" GFG2"F" FEF2 |"Em" E4- E4 :| | 
"Am" A3B/A/"G" G4 |"Am" A3B/A/"G" G4 |"Am" A3B/A/"G" G2G2 |"Am" A2A2"G" G2G2 |"Am" A2A2"G" GFG2 | 
"Em" E4- E4 |]  