Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
['.G.d.B .G.d.B .A.d.c .A.d.c', '[da]2 z', 'd3{d} cBc']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:G
 (d/B/) | .G.d.B .G.d.B | .A.d.c .A.d.c | Bdg{a} gfg | aaa a2 .d/.B/ | .G.d.B .G.d.B | 
 .A.d.c .A.d.c | Bdg{b} aga | ggg g2 :| !fermata!z | b2 z g2 z | [da][da][da] [da]2 z | a2 z f2 z | 
 ggg g2 z | [db]2 z [dg]2 z | [da][da][da] [da]2 z | [da]2 z [cf]2 z | [Bg][Bg][Bg] [Bg]2!D.C.! || 
 z | d3{d} cBc | d3{d} cBc | d2 d g2 b | (bag fed) | c3{d} cBc | c3{d} (BAB) | ced cBA | 
 GGG G/F/G/A/B/c/ | d3{d} cBc | d3{d} cBc | d2 d g2 b | bag fed | c3{d} BAB | c3{c} BAB | ced cBA | 
 GGG G2"^Da Capo" |]  