Make sure that your essential oils and the herbs you use smell similarly.
First you will need to gather all of your ingredients and lay them out neatly.
Take your candle holders and fill them with soy wax and as many colour tablets as you desire. The more you add, the darker your candles will be.
Put them in the mircowave (as long as they are not metal - if your holders are metal, melt the wax in a pot over boiling water double broiler style) and melt everything together. You will need to add more and more wax as you go along because melted soy wax yields much less than the flakes. Stir until mixed.
Add your herbs/fruit peel pieces and your oils. Mix again.
Add your essential oils, as much as you feel is necessary. Mix again.
Drop in your wick, making sure to place it in the centre of your holder. You can balance it and hold it in place as the wax hardens by laying a butter knife over the top of your candle holder and balancing the wick against it. (If it is a bit off centre, though, no one will be able to tell.)
(Optional) You can line up whole herbs against the edges of the mould and they will dry along the edges and make lovely decorations.
Let the wax harden.
Trim the wick.
Ta da! Your candles are ready! Make sure to make them with good intentions and feel free to carve sigils into the top.