Oldish song, can't figure out the name but I have the notes.?

The intro part is played by a sort of keyboard, (part inside parenthesis are on elec. guitar) It goes dundun, (bum bum bumm), dun dun dundun (bum bum bumm). then it goes to some higher notes, dun dun dundun. Then it starts all over. Its kinda oldies, everyone knows this song. Here are the notes: DD, CD, BB. Then it goes G G G F# G.