[SOLVED] How would I make a good blood system?

Hey there! So I want to make a blood system like the one in criminality / blood flow. I have tried some things but they turned out to be garbage. What I tried was making a custom particle by adding a velocity to it and when this particle gets touched, it will create a little blood puddle. But the problem was that the puddle would not rotate and stick to a wall, but it would just be on top of the Instance it touched. It also didn't work on terrain.

I know how to script, so an explanation is enough for me.

Thanks for reading!