Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
Q:1/2=60
M:2/2
K:G
['B/c/ dGBG c=F A2 dGBG gG B2', 'G B DD=FA cF TA2 GGBG dG', '', 'dGBe fg a/g/f/e/ fcAF GGBG dGBg ff', 'gG f/e/f/g/ a/g/f/e/ fcAF GGBB']  
X:1
L:1/8
Q:1/2=60
M:2/2
K:G
|: B/c/ | dGBG c=F A2 | dGBG gG B2 | dGBG cF (AB/c/) | dcBA G2 G :: B | DD=FA cF TA2 | 
 GGBG dG TB2 | DD=FA cFAB/c/ | dcBA G2 G :|[M:2/2][K:Gmix][Q:1/2=60] g |:"^NB" GGBG cFAF | 
 GGBG dGBe | fg a/g/f/e/ fcAF | GGBG dGBg :: ff a/g/f/e/ cf AF | fe/f/ g/f/e/f/ g/f/e/f/ gG | 
 f/e/f/g/ a/g/f/e/ fcAF | GGBB gGBg :|  