Realistic NPC Punch Help

Help and Feedback Scripting Support
#1

I have an already working script that find the closest player and uses simple path to run to the closest player how would I code it to where when close to the player it will set the walk speed to 0 play a wind up animation and do the punch which deals the damage. Here is a script I already have tried.

local dummy = script.Parent

local windUp = script:WaitForChild("windUp")
local humanoid = script.Parent:WaitForChild("Humanoid")
local windAnim = humanoid.Animator:LoadAnimation(windUp)

local punch = script:WaitForChild("punch")
local punchAnim = humanoid.Animator:LoadAnimation(punch)

local animDebounce = false

local npc = script.Parent
closestPlayer = nil
closestDistance = 200
local afterFuncDist = nil
function getClosestPlayer()

	for i, player in pairs(game:GetService("Players"):GetPlayers()) do
		local Character = player.Character
		local PrimaryPart = Character and Character.PrimaryPart
		local hum = Character and Character:FindFirstChildOfClass("Humanoid")

		if PrimaryPart and hum and (hum.Health > 0) then
			local distance = (npc.PrimaryPart.Position - PrimaryPart.Position).Magnitude
			if distance < closestDistance then

				closestPlayer = Character
				afterFuncDist = distance
			end
		end
	end
end	


if afterFuncDist <= 20 then
		if animDebounce == false then
			animDebounce = true
			dummy:SetAttribute("Pathfinding", false)
			dummy.Humanoid.JumpPower = 0
		dummy.Humanoid.WalkSpeed = 0
		windAnim:Play()
		task.wait(1)
		punchAnim:Play()
			closestPlayer.Humanoid.Health = 0
		dummy:SetAttribute("Pathfinding", true)
		dummy.Humanoid.JumpPower = 50
		dummy.Humanoid.WalkSpeed = 16
		end
		task.wait(3)
		animDebounce = false
	end

I am really confused why this isn’t working. Thanks for any help.