How to make an enemy target and follow ONLY after being hit?

function findNearestTorso(pos)
	local list = game.Workspace:children()
	local torso = nil
	local dist = 60
	local temp = nil
	local human = nil
	local temp2 = nil
	for x = 1, #list do
		temp2 = list[x]
		if (temp2.className == "Model") and (temp2 ~= script.Parent) then
			temp = temp2:findFirstChild("HumanoidRootPart")
			human = temp2:findFirstChild("Humanoid")
			if (temp ~= nil) and (human ~= nil) and (human.Health > 0) then--and not temp.Parent:findFirstChild("NPC") then
				if (temp.Position - script.PartSu.Position).Magnitude < dist then
					torso = temp
					dist = (temp.Position - script.PartSu.Position).Magnitude
				end
			end
		end
	end
	return torso
end


while true do
	wait(.1)
	local target = findNearestTorso(script.Parent.HumanoidRootPart.Position)
	if target ~= nil and not target.Parent:findFirstChild("NPC") then
		script.Parent.Humanoid:MoveTo(target.Position, target)
	else
		script.Parent.Humanoid:MoveTo(script.PartSu.Position, script.PartSu)
	end
end

This is my current script which is super glitchy due to the bottom part. When more than 1 enemy is around its like the enemy always runs back to PartSu.Position.

ok idk if this works, but if the enemy gets hit it should take damage so lets say the max health is 100 then you could put this at the start of the script

function follow()
local hp = script.Parent.Humanoid.Health
if hp <100 then
end
-- the follow player script

then at the bottom you can try this

script.Parent:Connect(follow)