I am making a two tier fondant cake and I am planning on making the top tier white fondant with a bright red drip (its casino theme). 

I have made many drip cakes before but only ever on buttercream cakes and I have used a form of ganache. 

I bought these Deco Melts from Hobbycraft that are red - could anyone advise me on what to do next? Shall I just melt these to drip onto the cake or shall I mix them with cream? On the packaging it says if you want it runnier to add a few drops of vegetable oil. 

I am just wondeirng how drips work with fondant and what the best way is. 

Thanks :) 

I'm a fan of candy melts for drips, the consistency is perfect every time. Literally a few drips....it won't take much to make it too thin! Usually when I melt them, it doesn't need to be thinned.

I like to use candy melts, too, for the colors and consistency.  ypierce82 is right, they don't really need anything added.  Your Deco Melts should be just fine on fondant.  Be sure your cake is cold.