Utilize the provided motif and the alphabetically represented musical sequence to craft an original musical composition.
X:1
L:1/8
M:2/4
K:G
['GBdc B A3 ABcB G A2 z']  
X:1
L:1/8
M:2/4
K:G
 GBdc | B A3 | ABcB | G A2 z | Gddc | B G3 | cB A2 | BA G2 |]  