Develop a musical composition based on the provided pattern of letters and incorporating the given motif within it.
X:1
L:1/8
M:3/4
K:G
['E2 D2 G>A', 'G G Bc d2- dG A/B/c d2']  
X:1
L:1/8
M:3/4
K:G
 G | GF E2 D2 | G>A B2- BG | B/c/d cB AG | FE D2- DD | GA/B/ E2 D2 | G>A BG Bd | ef/g/ dB A>G | 
 G4- G || G | Bc d2- dG | A/B/c d2 BG | Bd c>B AG | FE D4 | GB EF/E/ D2 | G>A B/A/G Bd | 
 eg dB A>G | G4- G ||  