Need help with finding nearest enemy to certain parts

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#1

I need some help, Im trying to make a system for my tower defense game were it would get the nearest enemy to a waypoint but in the raduis of the tower, here is my code for it

function findNearestWaypoint(pos)
	local Workspacelistofitems = game.Workspace.Map.WayPoints:GetChildren()
	local waypoint = nil
	local dist = math.huge
	local temp = nil
	local temp2 = nil
	for x = 1, #Workspacelistofitems do
		temp2 = Workspacelistofitems[x]
		if (temp2.className == "Part") and (temp2 ~= script.Parent) and game.Workspace.Map.WayPoints:FindFirstChild(tonumber(tostring(temp2)) + 1) then
			temp = game.Workspace.Map.WayPoints[tonumber(tostring(temp2)) + 1]
			if (temp ~= nil) then
				if (temp.Position - pos).magnitude < dist then
					waypoint = temp
					dist = (temp.Position - pos).magnitude
				end
			end
			
		elseif (temp2.className == "Part") and (temp2 ~= script.Parent) then
			temp = temp2
			if (temp ~= nil) then
				if (temp.Position - pos).magnitude < dist then
					waypoint = temp
					dist = (temp.Position - pos).magnitude
				end
			end
		end
	end
	return waypoint
end

function findNearestTorso(pos)
	local Workspacelistofitems = game.Workspace.Zombies:GetChildren()
	local torso = nil
	local temp = nil
	local dist = script.Parent.StatsFolder.Range.Value
	local human = nil
	local temp2 = nil
	for x = 1, #Workspacelistofitems do
		temp2 = Workspacelistofitems[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
				if (temp.Position - script.Parent.HumanoidRootPart.Position).magnitude < dist then
					print(math.floor(dist + 0.5).." "..x.." "..math.floor((temp.Position - script.Parent.HumanoidRootPart.Position).magnitude + 0.5))
					torso = temp
					dist = (temp.Position - pos).magnitude
				end
			end
		end
	end
	return torso
end
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