Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:2/4
K:C
['G4 AA']  
X:1
L:1/8
M:2/4
K:C
 GG GG G4 | AA AF G3 G | B2 BB B2 AB | cc c2 G4 | AA AA c3- c/c/ | GG GE G4 | F2 FG A2 GF | G8 | 
 GG GG G4 | AA GF G3 G |[M:2/4] B2 B2 | B2 G2 | A2 B2 | c6 | cc A2 | A2 c3 | c B2 G | A B3 | 
 B A2 F2 | AB A2 | G2 E2 | G3 G | F2 FG | A2 GF | G8 |]  