For this one I used an 8" x 8" canvas block, mixed separate pots of different coloured acrylic and poster paints mixed with Liquitex pouring medium plus a few drops of silicone glue and water. I then poured a little from each pot into another pot, turned this upside down on the canvas and surrounded this with black paint. Next I lifted the pot and let the colours run across the canvas. I blew through a straw to encourage different shapes. Just having fun with colours and shapes.