Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
['F3 A2 F E3 G3 FAF Edc', 'a2 f']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:D
 F3 A2 F | E3 G3 | FAF Edc | dAG FGE | (F2 A) (d2 f) | (A2 c) (e2 g) | fdf agf | Tf3 Te3 :: 
 f3 a2 f | g2 d b3 | cef gfe | fed a2 f | (g2 e) (f2 d) | (e2 c) (d2 g) | (f2 a) (e2 g) | f3 d3 :|  