function show_heart(pos)
	minetest.add_particle(
	    {
	        pos = pos,
	        velocity = {x=0, y=1, z=0},
	        acceleration = {x=0, y=0, z=0},
	        -- Spawn particle at pos with velocity and acceleration
	
	        expirationtime = 1,
	        -- Disappears after expirationtime seconds
	
	        size = 3,
	        -- Scales the visual size of the particle texture.
	        -- If `node` is set, size can be set to 0 to spawn a randomly-sized
	        -- particle (just like actual node dig particles).
	
	        texture = "heart.png",
	        -- The texture of the particle
	
	        glow = 0
	        -- Optional, specify particle self-luminescence in darkness.
	        -- Values 0-14.
	    }
	    )

end

function show_hearts(player)
	local hearts = 2+math.ceil(math.random()*3)
	local player_pos = player:get_pos()
	local looking_dir = player:get_look_dir()
	looking_dir.y = 0 

	for i=0,hearts do
		local vert_offset = 1.5*math.random()-0.75
		local y_offset = 0.5*math.random() + 1.5
		local offset = vector.multiply(looking_dir, vert_offset)
		offset.y = y_offset
		offset.x, offset.z = offset.z, offset.x

		show_heart(vector.add(player_pos,offset))
	end
end

minetest.register_on_player_hpchange(function(player, hp_change, reason) 
	if hp_change < 0 then
		show_hearts(player)
	end
end)