Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
['G2 c3 d (cB)(AG) G2 (B/A/B/d/) e2{a}', 'D2 c2 (cd) (cB)(AG) G2 (B/A/B/d/) e2', 'z e (=f>e)(fg)'  
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
"^Slow" G2 | c3 d (cB)(AG) | G2 (B/A/B/d/) e2{a} g{f}e | (d<B) (AG) (ED)(EG) | G4 z2 D2 || 
 c2 (cd) (cB)(AG) | G2 (B/A/B/d/) e2 (ge) | (d<B) (AG) (ED)(EG) | G4 z2 :: z e | 
 (=f>e)(fg) (fe)(dB) | d2 (eg) g3 =f | (fe)(ge) (ed)(ge) | (dB) (c/B/A/G/) ED z e | 
 (=f>e)(fg) e2 g2 | G2 Bd e2{a} g{f}e | d<B AG |1 (ED)(EG) | G6 :|2({F} Ec/B/) c/B/A/G/ | G6 |]  