Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
['BG GA/B/ cABG AF DF', 'z2 dB Bc/d/ c2 cA AB/c/ B2']  
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
 BG GA/B/ | cABG | AF DF | G2 G,2 | BG GA/B/ | cABG | AF DF | G2 z2 :: dB Bc/d/ | ec"^tr" c2 | 
 cA AB/c/ | dB"^tr" B2 | BG GA/B/ | cA"^tr" A2 | BG DF | G2 G,2 :|  