Here is a card I have made using Imagination Crafts Fir Tree Stencil, Fir Tree Background Card and Sparkle Medium in Teal and Hunters Green.
I too the fir trees printed background card and laid the stencil over it and spread the Hunter Green Sparkle Medium over it using the spatula. I then added some of the Teal Sparkle Medium to the edges of the branches where the moonlight shines through the trees.
Once this was dry I trimmed around the edges of the card, matt this onto a piece of dark green card then onto yellow card. That is it friends, very easy yet looks effective.