Script timeout: exhausted allowed execution time How to fix error?

So basically I am cloning an NPC 10 times, the script

local val = game.ReplicatedStorage.numberval.Value


for i = 1,10 do
	game.ReplicatedStorage.bacteria:Clone()
	game.ReplicatedStorage.bacteria:Clone().Parent = workspace
	game.ReplicatedStorage.bacteria:Clone().HumanoidRootPart.Position = Vector3.new(math.random(-315.026, -268.827),-148.634, 2.76)
	print("spawned 1wave")
	wait()
end

if val >= 10 then
	for i = 1,10 do
		game.ReplicatedStorage.bacteria:Clone()
		game.ReplicatedStorage.bacteria:Clone().Parent = workspace
		game.ReplicatedStorage.bacteria:Clone().HumanoidRootPart.Position = Vector3.new(math.random(-315.026, -268.827),-148.634, 2.76)
		print("spawned 2wave")
		wait()
	end
elseif val >= 20 then
	for i = 1,10 do
		game.ReplicatedStorage.bacteria:Clone()
		game.ReplicatedStorage.bacteria:Clone().Parent = workspace
		game.ReplicatedStorage.bacteria:Clone().HumanoidRootPart.Position = Vector3.new(math.random(-315.026, -268.827),-148.634, 2.76)
		print("spawned 3wave")
		wait()
	end
elseif val >= 30 then
	for i = 1,10 do
		game.ReplicatedStorage.bacteria:Clone()
		game.ReplicatedStorage.bacteria:Clone().Parent = workspace
		game.ReplicatedStorage.bacteria:Clone().HumanoidRootPart.Position = Vector3.new(math.random(-315.026, -268.827),-148.634, 2.76)
		print("spawned 4wave")
		wait()
	end
elseif val >= 40 then
	for i,v in pairs(game.Workspace:GetChildren()) do
		if v.Name == "bacteria" and v.Humanoid then
			v:remove()
			print("removed waste.....")
		end
	end
end

the first block of code is the important part, this error started when I put the small script below inside the NPC that is being cloned,

--the script is in the model the npc that is being cloned , the npc is stored in replicated storage
wait(1)
while true do --where the stack ends
if script.Parent.Humanoid.Health <= 0 then
	game.ReplicatedStorage.numberval.Value = game.ReplicatedStorage.numberval.Value + 1
wait()
		print("added 1")
	end
end
--this script is where the error occurs, but only occurs once the script above this is enabled, even though the script is enabled in the NPC that is being cloned in replicatedstorage
, so it happens when its cloned

I've tried messing with settings when I enabled the script to clone the NPC it practically crashes roblox I'm trying to make it that once the value = 0 it stops spawning the npcs Before this I made a script practically like this but I ended up removing it. If you have any other ways of trying to perform what I have attempted please do so in the comments