Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
['', 'BG G/G/G', 'g2 dB', 'gd (Bc/d/) gd', 'Gd BdGd']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
 e || BG G/G/G BGdG | BG G/G/G G2 gd | BG G/G/G BGdB | A/B/c =Fc AFcA :| g2 dB (G/B/c) dB | 
 g2 dB gbaf | g2 dB (GA/B/) dB | A=fcf A=FcA :| (B/c/d) gd (Bc/d/) gd | (Bc/d/) gd BGGB | 
 (A/B/c) =fc AB/c/ fc | (AB/c/) =fc A=FFc | (B/c/d) gd (Bc/d/) gd | (Bc/d/) gd Bdgd | =fgag fgfd | 
 cA=fc A=FFc || (B/c/d) Gd BdGd | (Bc/d/) Gd BGGB | (A/B/c) =Fc AcFc | (AB/c/) =Fc AFFc | 
 (B/c/d) Gd BdGd | (Bc/d/) Gd BdGd | =fgag fgfd | cA=fc A=FF |]  