Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/16
Q:1/8=100
M:3/8
K:G
['G>AB>cd>B G2G2G2', 'd4{ga} b>g d2d2 c>B', '(B<d)(B<d) (g<b)']  
X:1
L:1/16
Q:1/8=100
M:3/8
K:G
 D2 | G>AB>cd>B | G2G2G2 | A2d2d2 | B2G2D2 | G>AB>cd>B | G2G2G2 | A2d2d2 | G4 :| B>c | d4{ga} b>g | 
 d2d2 c>B | A>Bc>de>f | g>fg>a b2 | d4{ga} b>g | d2d2 c>B | A>Bc>Bc>A | G4 || d>c | 
 (B<d)(B<d) (g<b) | (B<d)(B<d) (g<b) | A<cA<c f<a | g>fg>a b2 | (B<d)(B<d) (g<b) | 
 (B<d)(B<d) (g<b) | A>cA>c a>f | g6 D<EF/"^Da Capo" |]  