Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:2/2
K:G
['G2 BG', 'g2 afed']  
X:1
L:1/8
M:2/2
K:G
 D |:"G" G2 BG Bd d2 |"C" c2 ec eg g2 |"G" G2 BG Bcdg |"Am" edcB"D7" [AF]2"G" G z :: 
"G" g2 bg"D7" afed |"C" edef"G" gdBG |"G" g2 bg"D7" afed |"C" edef"G" g2 ga |"G" bagf"^(Em)" gfed | 
"C" edef"G" gdBG |"Am" cBcd"^(C)" efge |"G" dBGB"D7" [AF]2"G" G z :|  