From: Virmuntie 
Orchid - Bass
Black Sabbath - Master Of Reality  (1971)

                        2x riff 1
|----------|---------------------------------------|
|-(intro)--|---------------------------------------|
|----------|---------------------------------------|
|----------|--7*----------9*----------2*---------7*|
          2x riff 2
|------------------------------|
|------------------------------|
|------------------------------|
|---12*----------7*------------|
          1x riff 3		
|------------------------------|
|------------------------------|
|------------------------------|
|--11*-------------9*----------|
          1x riff 1


|----------------------------------------|
|----------------------------------------|
|----------------------------------------|
|--7*----------9*----------2*----------7*|
							  
|-------------------------------------------------------------|
|------------------------------------(slow-down-at-this-part)-|
|-------------------------------------------------------------|
|--7*----------9*----------2*----------7*------9*-----7=======|
					     	
						"=" = hold the note
						 *  = represent the same note X times