Valentines day cupcakes using edible pens

How to make Valentines cupcakes with cute fondant hearts decorated with edible pens ( Rainbow dust cake pens ). I use Renshaws flower and modelling paste to make the hearts, You can see links to the products used below. Tools and products used in this video - Modelling paste - Rainbow dust edible pens - Alphabet stampers - Heart cutters - Heart plunger cutters - To see mo