First you put the peas in water overnight, you have to use whole peas or they wont sprout.
After the peas have soaked you drain the water and put the peas in a cheese cloth and twist the loose ends tight and put it in a light tight container twistie ends down.
Keep the container somewhere dark and water the cloth regularly (I use a spray bottle). The cloth can´t ever get dry. In two or three days you should have a cloth full of bean sprouts.
Remove the sprouts from the cloth and keep them in a fridge.
Here are some photos of the procedure.
Good luck with all your bean sprouting.