I figure this is the right place to ask so here it goes. I'm trying to play the song Black Sabbath by the band Black Sabbath and I can play most of it except for a little trouble with the intro riff. I'm talking about the part where Tony does the trill 4h5p4 etc...

Is it like Beat 1: 4h5p4h5p4h5p4h5 Beat 2: 4h5p4h5p4h5p4h5 etc...
Or is it Beat 1: 4h5p4h5p4h5p Beat 2: 4h5p4h5p4h5p etc...
Or something completely different?

Does this question make any sense? Thanks in advance.
It's just a long trill; you're really thinking too hard about it.
R.I.P. My Signature. Lost to us in the great Signature Massacre of 2014.

Quote by Master Foo
“A man who mistakes secrets for knowledge is like a man who, seeking light, hugs a candle so closely that he smothers it and burns his hand.”

Yeah, like tremolo picking, it's not too big of a deal if you play one more or less.