Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
M:6/8
K:G
['BAG AFD', 'fga bag agf def g2 a bag', 'def gdB |1 cAF', 'bag agf', 'dBG cA=F FEF C=FA cBc dBG GBd']  
X:1
L:1/8
M:6/8
K:G
 BAG AFD | G3 FGA | BAG BdB | cAG FGA | BAG AFD | GBd g3 | def gdB |1 cAF G2 A :|2 cAF G2 B |: 
 d2 g gfg | a2 g fga | bag agf | def g2 a | bag afd | gag fed | def gdB |1 cAF G2 B :|2 cAF GBc |: 
 dBG GFG | dBG GAB | cA=F FEF | cA=F FBc | dBG GBd | gag fed | def gdB |1 cAF GA/B/c :|2 
 cAF G2 A |:"^variations" B2 G AGF | DGE FGA | BAG Bcd | cAG FGA | B2 G AFD | GBd gdB | def gdB |1 
 cAF G2 A :|2 cAF G2 B |: dgg gfg | abg fga | bag agf | def g2 a | bag agf | g3 fed | def gdB |1 
 cAF G2 B :|2 cAF GA/B/c |: dBG GFG | DGB dBG | cA=F FEF | C=FA cBc | dBG GBd | g3 fed | def gdB |1 
 cAF GBc :|2 cAF G2 A ||  