Craft melodious tunes in accordance with the outlined letter representation and the provided thematic element.
X:1
L:1/8
M:4/4
K:Bb
['GA Bc']  
X:1
L:1/8
M:4/4
K:Bb
 GA Bc d2 G2 | G2 ^F2 G4 | Bc de f2 B2 | B2 A2 B4 | Bc de f2 d2 | cB AG ^F2 D2 | GA Bc d2 G3/2 G/ | 
 G2 ^F2 G3 G | dd dd d2 ef | g2 gg f3 f | cc cc c2 de | (fe) dc d3 d | dd dd ^F3 F | 
 GA Bc A2 D3/2 D/ | GA Bc A2 G2 | G2 ^F2 G4 |]  