Compose harmonious chord progressions to enhance the existing musical composition.
FG | A2AG F2FG | AAAF A2fg | fafg gaec |1,3"^(D)" e2d2 dd :|2,4"^(D)" e2d2 d2 :: A2 | 
 d2dg gfga | abb2 bagf | edcd cegb | a2aa a2ab | agfg a2Ac | cedc d2B2 | 
 A2Ag gfec |"^(D)" e2d2 d2 :|  
X:1
L:1/16
M:2/4
K:D
 FG |"D" A2AG F2FG | AAAF A2fg |"A7" fafg gaec |1,3"^(D)" e2d2"D" dd :|2,4"^(D)" e2d2"D" d2 :: A2 | 
"D" d2dg gfga |"G" abb2 bagf |"A7" edcd cegb |"D" a2aa a2ab |"D" agfg a2Ac |"A7" cedc"G" d2B2 | 
"A7" A2Ag gfec |"^(D)" e2d2"D" d2 :|  