Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/4
M:4/4
K:G
['A3/2 c/ B G']  
X:1
L:1/4
M:4/4
K:G
"G" D G"D" F G |"A7" A B"D" E2 |"G" G2"D7" A3/2 c/ |"G" B G G2 |"G" D G"D" F G |"A7" A B"D" F2 | 
"G" G2"D7" A3/2 c/ |"G" B G G |"G" B d d c/B/ |"Am" c c c2 |"Am" c B"A7" A G |"D7" F E"G" D2 | 
"G" d3/2 B/"C" c A |"A7" B G"D" A2 |"C" G2"D7" A3/2 c/ |"G" B G G2 :|  