Arrange a song combining the mentioned alphabetical representation of a musical pattern and the given melodic theme.
X:1
L:1/8
Q:1/4=140
M:2/2
K:G
['Bdgd BGGB', 'dgbg dgBg']  
X:1
L:1/8
Q:1/4=140
M:2/2
K:G
 dc | Bdgd BGGB | AFcF dFAc | Bdgd BGGB | AFcA G2 :| Bc | dgbg dgBg | A=fcf AFFc | dgbg dgBg | 
 AFcA G2 Bc | dgbg dgBg | A=fcf AFFc | BcdB ceag | fdef gedc |]  