Develop a tune that adheres to the predetermined chord sequence.
'D', 'Em', 'A7', 'D', 'Em', 'A7', 'D', 'D', 'Em', 'A7', 'D', 'Em', 'A7', 'D'  
X:1
L:1/8
M:4/4
K:D
"D" D2 FD A,DFA | dcBA ^GAFD |"Em" E2 GE B,EGB |"A7" gecA GECA, |"D" D2 FD A,DFA | dDcD BDAf | 
"Em" gefd ecdB |"A7" AFGE"D" DABc |]"D" d2 fd AdFA | DFAd fagf |"Em" e2 ge BeGB |"A7" CEAc egfe | 
"D" d2 fd AdFA | DFAd fagf |"Em" gefd ecdB |"A7" AFGE"D" D4 |]  