Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
Q:3/8=104
M:6/8
K:D
['F2 F FGA B2 B B3', 'd3 c3']  
X:1
L:1/8
Q:3/8=104
M:6/8
K:D
 F2 F FGA | B2 B B3 | A2 A A2 B | A2 G F2 E | F2 F FGA | B2 B B3 | ABc dAF | E3 D3 :| d3 c3 | 
 B3 A3 | d3 c3 | BcB A2 G | F2 F FGA | B2 B B3 | ABc dAF | E3 D3 :|  