Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/4
Q:1/4=120
M:6/4
K:Dmix
['B G', 'B3/2 A/ G']  
X:1
L:1/4
Q:1/4=120
M:6/4
K:Dmix
 B/c/ | d2 d d2 c | B/c/ d B G B G | A F D E2 F | (G3 G2) :| G | F2 E F2 G | A3/2 B/ A D2 A | 
 B3/2 A/ G A2 B | (c3 c2)"^:s:" d | B3/2 A/ G A2 D | B3/2 A/ G c2 B | A3/2 G/ F E2 D | (D3 D2) |]  