Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
Q:3/8=72
M:6/8
K:Gmin
['GG (B2 A c2) A G ^F2-']  
X:1
L:1/8
Q:3/8=72
M:6/8
K:Gmin
 GG | (B2 A c2) A | G ^F2- F3 | G2 G ^F2 A | G3- GAB | (d>cB c2) B | A A2- A3 | c2 A{B} A2 G | 
 G3- G :|  