Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:F
['modern fg ag f2 c2 efgf e3']  
X:1
L:1/8
M:2/2
K:F
"^in modern notation." fg ag f2 c2 | efgf e3 e | ffed c2 e2 | A2 B2 c3 B | cdef ec A2 | 
 GABc BG E2 | FGAB c2 g2 | efgf f4 |]  