Lost my favourite brush 36

Hi, I’m a professional illustrator who works on Photoshop. I’ve recently upgraded from CS6 to Photoshop CC. In my old version, CS6, I used to use brush 36, which looked a bit like a chalk brush but did this wonder thing where I could get both the foreground and background colour coming through so it looked a bit like smudged paint. So I could use, say, dark blue foreground and then get light pink background blobs coming through, when I pressed on the pen. This only works with a touch sensitive graphics tablet and pen. But it’s gone? I can’t find brush 36 and I can’t work out how to get both the foreground and background colours on a touch sensitive tablet. It only seemed to work with brush 36, and not with any other brush. If I can’t work it out I’ll have to go back to the dark side, as I basically, had a good thing going with my beloved brush 36...and produced some of my best work with it. Please help...thanks in advance

Message was edited by: Angela Holland-Yousaf