Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/4
M:4/4
K:G
['G/G/ G', 'd2 e3/2 f/ g f e2 d']  
X:1
L:1/4
M:4/4
K:G
 G/G/ G G G/G/ | G B d B | A/A/ A B G | E2 D E | G/G/ G G G/G/ | G B d B | e3/2 f/ g f |1 
 e d e g :|2 e d e f |: g3/2 f/ g a | g d d2 | e3/2 f/ g f | e2 d c | B/c/ d e f | g3/2 f/ e g | 
 d B g B |1 A2 G E :|2 A2 z2 ||  