Develop a musical composition incorporating the given motif while adhering to the outlined alphabetical form.
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
['(d/c/) |:O B2', 'cBc dBG GBd', 'a2 f dfa b2 g dgb']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
"^Allegreto" (d/c/) |:O B2 B cBc | dBG GBd | e2 f (gfe) | (de)c (Bc)A | B2 B cBc | dBG GBd | 
 ecb agf | ggg g2!fine! || e2 | a2 f dfa | b2 g dgb | (ca) (b2 g) | afd d2 g | a2 f dfa | 
 b2 g dgb | (abg) (fge) | dec (BcA)O!D.S.! ||  