Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
['GFGA B2 G2'  
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
 GE |"G" D2 DE G2 GA | BGBd cBAG |"D" FGFE DEFG |"D7" AFdF E2"C" GE |"G" D2 DE"Em" G2 DA | 
"G" BGBd"C" efge |"G" dcBA"D7" GFGA | B2 G2 G2 :: z d |"G" g2 g2 gb ag |"B7" f2 f2 fagf | 
"Em" e2 ef gfed | B2 e2 e2 ge |"G" dBGB d2 d2 |"C" edef"A7" g2 fe |"G" dcBA"D7" GFGA | 
"G" B2 G2 G2 :|  