How do you make an enemy hide or disappear when hit?

I am still pretty new and I do not how to do this yet if someone can help me. that would be nice. :)

stop drawing the enemy when it's hit.

what do you mean? like in code can you show me.

Okay, so lets say you have the following object somewhere:

enemy = object
  hp = 15
  defeated = false
  x = 0
  y = 0
end

Then you can do this in the drawing function:

if not enemy.defeated then
  screen.drawSprite("enemy",enemy.x,enemy.y)
end

While classes are better in this case, this should showcase it well.

Yeah @confusedcatgirl explains it well.

If you wanted an enemy to stop appearing just stop drawing it all together.

Code example:

enemy = class
   constructor = function(x,y)
      this.x = x
      this.y = y
      
      hp = 100

      dead = false
   end

   update = function()
      *what you want about the enemy to update*
 
      if hp <= 0 then
         dead = true
      end
   end

   
   draw = function()
     if not dead then
      screen.drawSprite( *enemy stuff here...* )
     end
   end
end

thanks guys. thank you so much. :)