Construct chord patterns that blend well with the existing music piece.
A,D D2 DEFA | BFAF EFGA | dBcA BdAF | GEFD EDB,D | A,D D2 DEFA | BFAF EFGA | 
 dBcA BdAF |1 GFEG FDDB, :|2 GFEG FDDe || fd d2 fdgd | fdgf edBc | 
 dBBA Bcde | fdgf e2 de | fd d2 fdgd | fdgf edBc | dBBA BdAF | 
 GFEG FDDe | fd d2 fdgd | fdgf edBc | dBBA Bcde | fdgf e3 g | 
 faaf egfe | dfed BAFE | D2 CD B,CDF | BFAF DEDB, |]  
X:1
L:1/8
Q:1/8=200
M:2/2
K:D
"D" A,D D2 DEFA | BFAF"A" EFGA |"D" dBcA BdAF |"Em" GEFD"A" EDB,D |"D" A,D D2 DEFA | BFAF"A" EFGA | 
"D" dBcA BdAF |1"A" GFEG"D" FDDB, :|2"A" GFEG"D" FDDe ||"D" fd d2 fd"G"gd |"D" fdgf"A" edBc | 
"D" dBBA Bcde |"Em" fdgf"A" e2 de |"D" fd d2 fd"G"gd |"D" fdgf"A" edBc |"D" dBBA BdAF | 
"A" GFEG"D" FDDe |"D" fd d2 fd"G"gd |"D" fdgf"A" edBc |"D" dBBA Bcde |"Em" fdgf"A" e3 g | 
"D" faaf"G" egfe |"D" dfed BAFE | D2 CD B,CDF |"A" BFAF"D" DEDB, |]  