Produce a tune that adheres to the mentioned chord progression.
'D', 'Em', 'G', 'A7', 'D', 'G', 'D', 'Em', 'A7', 'D', 'Em', 'G', 'A7', 'D', 'G', 'D', 'Em', 'A7'  
X:1
L:1/8
M:4/4
K:D
"D" D2 D>F A<A A>F | A>Bd>A F2 E>D |"Em" E2 E>G B<B B>A |"G" d>fe>d"A7" B2 B<d | 
"D" D2 D>F A<A A>F | A>Bd>A F2 E>D |"G" G>B G<B"D" F>A F<A |"Em" E>FG>A"A7" B2 A2 | 
"D" d>ef>e d<d d>A | B>Ad>A F2 E>D |"Em" e2 e>f e2 e>f |"G" g>fe>d"A7" B2 A2 |"D" d>ef>e d2 d>A | 
 B>Ad>A F2 E>D |"G" G>B G<B"D" F>A F<A |"Em" E>FG>A"A7" B2 A2 |]  