Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
Q:1/4=180
M:2/2
K:G
['B2 B2 AG']  
X:1
L:1/8
Q:1/4=180
M:2/2
K:G
"G" B2 B2 AG FE |"D" E2 D2 D2 DE | F2 F2 FE DF |"G" A2 G2 G4 |"G" d2 ed c2 B2 |"Am" A2 E2 E2 c2 | 
"G" BA GF"C" E2"D" F2 |"G" G4 G4 ::[K:D]"D" A2 A2"G" B2 B2 |"D" AG FG A2 BA |"A" GF EF G2 AG | 
"D" FE DE F4 |"D" A2 A2"G" B2 B2 |"D" AG FG A2 BA |"A" GF EF GA Bc |"D" d4 d4 :|  