Black Sabbath - Paranoid Chords & Tabs

Rght I'm Doin This For A School Gig.. 
A MAte made this tab for me so i thought i'd share it with yas... :)
[ Tab from: https://www.guitartabs.cc/tabs/b/black_sabbath/paranoid_btab_ver_7.html ]
Main Riff: 
-----------------------------------------
-------------------------------------5---
-7-7-7-7-7-7-7-7-7-------5-5-5-5-5-5--5-7
-------------------0-5-7-----------------

Only bit he gave me, soz it aint the whole thing