how to make knife animations in a first person view

Unity Engine
1

And when u hit an enemy blood to gush out and stuff.I want it to be gorey

2

Your question is just not very specific…

As for the when you hit an enemy, its all in the OnCollisionEnter or OnTriggerEnter depending on what you want.

function OnTriggerEnter(other:Collider)
{
if(other.gameObject.tag == "Enemy")
{
//let blood gush out
}

}