New technique for my backgrounds

This is a technique I have been working on for the backgrounds of my flower paintings. I have been using acrylic paint for this as it dries quicker than the oils, therefore allowing me to proceed with the next stage of the painting much sooner. As you can see from the photographs I start by painting the whole canvas in yellow, then a couple of coats of a light green, quite watered down so I can build up a couple of layers. After that has dried I splash the darker green paint onto the canvas, then lightly drag a large bristle brush up the canvas to create the final effect. I have just finished 2 paintings of poppies where I used this technique on the background and am quite pleased with the results.