Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
M:4/4
K:D
["f2 f2 g_e=eg f2 e2 e'3 d'", 'dced c2 F2 d3 c c2 B2', 'g2 g2']  
X:1
L:1/8
M:4/4
K:D
 f2 f2 g_e=eg | f2 e2 e'3 d' | c2 b2 c2 (eg) | (ba)fd A4 | f2 f2 g_e=eg | f2 e2 e'3 d' | 
 (c'b)eg (ba)Bc | d2 d2 d2 z2 :|[K:A] E2 A2 dced | c2 F2 d3 c | c2 B2 F3 G | (BA)GA E4 | 
 E2 A2 dced | c2 F2 d3 c | c2 B2 F3 G |1 B2 A2 A2 z2 :|2 b2 a2 g2 =g2 || 
[K:G]"^Trio" (Bd) g2 (gd) B2 | (ec) A2 A4 | (FG) A2 (FG) A2 | (BA)Bc ^c2 d2 | (Bd) g2 (gd) B2 | 
 (ec) A2 A4 | (FG) A2 B2 (cd)ef | g2 g2 g2 z2 ||  