Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:4/4
K:D
['F2 AF']  
X:1
L:1/8
M:4/4
K:D
 F2 AF BFAF | F2 AF EFDE | F2 AF BFAF | GBAF EDB,D | F2 AF BFAF | (3FFF AF EFDE | FA (3AAA BAFB | 
 ABde fddc | d3 B ADFA | dcde f2 fe | dcdB AFDF | (3GFE ED EDB,D | d3 B ADFA | dcde fzfe | 
 dcdB AFDF | (3GFE ED EDB,D | d3 e fded | dcde fBBA | d2 fd efdB | (3ABA FD EB,B, z | d3 e fded | 
 dcde fBB z | g2 fg (3efe dB | ABde fdAG |]  