Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:2/4
K:G
['(G/A/) (TBA)(Bd) G2 ge .d(BAB) G2 (AB)', '(c/B/) (cd)(ef) |{ef} g2 Tfe dBTAG A2', '(BA)(AG) G2 g(e/g/) |{e} d(B/d/) TAG G2', 'g>aba (g/e/d/e/) (g/e/d/B/) A2 (GA) B2 g(e/g/)'  
X:1
L:1/8
M:2/4
K:G
"_Slow" (G/A/) | (TBA)(Bd) | G2 ge | .d(BAB) | G2 (AB) | (cd)(ef) |{ef} g2 Tf>e | d3 :: (c/B/) | 
 (cd)(ef) |{ef} g2 Tfe | dBTAG | A2 (GA) | B2 Be | (dc)(BA) | G3 :: (G/A/) | (BA)(AG) | 
 G2 g(e/g/) |{e} d(B/d/) TAG | G2 AB | (c/e/d/=f/) (e/g/^f/a/) | g2 Tf>e | d3 :: B | 
 (c/B/c/d/) (e/d/e/f/) | g>aba | (g/e/d/e/) (g/e/d/B/) | A2 (GA) | B2 g(e/g/) |{e} dB({d} cB/A/) | 
 G3 :|  