Arrange a song combining the mentioned alphabetical representation of a musical pattern and the given melodic theme.
X:1
L:1/8
M:4/4
K:D
['B2 Bc', 'eBef g2']  
X:1
L:1/8
M:4/4
K:D
 F | E2 EF B2 Bc | d2 AG FDDF | E/E/E EF B2 Bc | dBAF GEEF | EEEF B2 Bc | d2 AG FDDF | EFGA BBBg | 
 fedf eee || f | eBef g2 fe | fbag fdd^d | eBef g2 eg | bgaf e2 ef | e^def geBg | fdAG FDDf | 
 geBg (ef)dA | FdAF E2 E ||  