Develop a tune that adheres to the predetermined chord sequence.
'D', 'Em', 'A7', 'D', 'G', 'A7', 'D', 'D', 'Em', 'A7', 'D', 'G', 'A7', 'D'  
X:1
L:1/8
M:4/4
K:D
 FG |"D" A2 FA BAFA | A2 FA BAFA |"Em" B2 cA BAcA |"A7" BAcA BAFG |"D" A2 FA BAFA | A2 FA BAFE | 
 (3FGA Bc"G" d3 B |"A7" AFEF"D" D2 :: FG |"D" Ad d2 Ad d2 | AddA BAFA |"Em" B2 cA BAcA | 
"A7" BAcA BAFG |"D" Ad d2 Ad d2 | AddA BAFE | (3FGA Bc"G" d3 B |"A7" AFEF"D" D2 :|  