I am a beginner bassist. I admire the style of bassists like flea and bootsy collins, but I can't figure out how to slap. I mean I know that you hit the E and A strings with your thumb, and you pluck the D and G strings with your middle finger. I know how to make percussive tones, but I cant put it together! Every book I see tells me what I already know about slap and then immediately gives me a complex line to start with. I also do practise whenever I can, but nothing works. HELP!