Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
['G>A BB B2']  
X:1
L:1/8
Q:1/4=120
M:2/4
K:G
"G" G>A BB |"Am" cA"G" B2 | BA"Am" AG/A/ |"G" BA"Am" A2 |"G" G>A BB |"Am" cA"G" B2 | BA"D7" dd | 
"G" G2 G2 ::"Em" eg"G" dd/d/ |"Am" cd"G" B2 |"G" BA"Am" AG/A/ |"G" BA"Am" A2 |"Em" eg"G"dd/d/ | 
"Am" cd"G" B2 | BA d"D7" d |"G" G2 G2 :|  