Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['A3 F', 'g2 fe d2 fd']  
X:1
L:1/8
M:4/4
K:D
 B3 A B3 d | ABdB efdB | A3 F A3 F | ABde fdeB | dBBA B3 d | ABdg fedB | A3 F A3 F | ABde faef || 
 d3 f edfe | dafa g2 fe | d2 fd efgf | eaaf g2 fe | d2 fd edfe | dafd g2 dg | bgaf gfed | 
 (3Bcd ef gfed ||  