AI breaks whenever it takes damage?

Hi there, i'm pretty new to scripting, and i've been dabbling around with this script to try and increase local NoticeDistance to 300 whenever the humanoid is below full health. My changes are on line 10 and 44, and the script works perfectly fine before that. My ultimate goal with this is to try and get the humanoid to aggro at an increased distance whenever it takes damage. Any help would be greatly appreciated.

--[[ By: Brutez. ]]-- 
-- Edited by hulabee
local Bob=script.Parent;
local BobHumanoid=Bob:FindFirstChild('Humanoid');
local BobHumanoidRootPart = Bob:FindFirstChild('HumanoidRootPart');
local TheySeeHimKissingDoors=BobHumanoidRootPart:FindFirstChild("BobWhisper");
local DaggerSwingsound=BobHumanoidRootPart:FindFirstChild("DaggerSound");
local SwingDagger=BobHumanoid:LoadAnimation(Bob:FindFirstChild('Slash'));
local AttackDebounce=false;
function takedamage()
    local NoticeDistance = 300
    wait(300)
end
while wait(0)do
if Bob and BobHumanoidRootPart and TheySeeHimKissingDoors and not TheySeeHimKissingDoors.IsPlaying then
TheySeeHimKissingDoors:Play();
end;
if Bob and BobHumanoid and not BobHumanoid.AutoJumpEnabled then
BobHumanoid.AutoJumpEnabled=true;
end;
if Bob and BobHumanoid and not BobHumanoid.AutoRotate then
BobHumanoid.AutoRotate=true;
end;
if Bob and BobHumanoid and BobHumanoid.PlatformStand then
BobHumanoid.PlatformStand=false;
end;
if Bob and BobHumanoid and BobHumanoid.Sit then
BobHumanoid.Sit=false;
end;
if Bob and BobHumanoid then
BobHumanoid.JumpPower=50;
BobHumanoid.WalkSpeed=13;
end;
if Bob and Bob:FindFirstChild("Head")and Bob:FindFirstChild("Torso")and BobHumanoid and BobHumanoid.Health>0.001 then
local NoticeDistance=60;
for _,TargetModel in pairs(game:GetService("Workspace"):GetChildren())do
if TargetModel.className=="Model"and TargetModel~=Bob and TargetModel.Name ~= "gay" and TargetModel:FindFirstChild("Torso")and TargetModel:FindFirstChild("Head")then
local TargetPart=TargetModel:FindFirstChild("Torso")
local FoundHumanoid;
for _,Child in pairs(TargetModel:GetChildren())do
if Child.ClassName=="Humanoid"then
FoundHumanoid=Child;
end
if BobHumanoid.Health ~= BobHumanoid.MaxHealth then
    takedamage()
    else
end
end

if TargetModel and TargetPart and FoundHumanoid and FoundHumanoid.Health>0.001 and Bob and Bob:FindFirstChild("Torso")and(TargetPart.Position-Bob:FindFirstChild("Torso").Position).magnitude<NoticeDistance then
if TargetModel and TargetPart and FoundHumanoid and FoundHumanoid.Health>0.001 and FoundHumanoid.Jump then
BobHumanoid.Jump=true;
end;
NoticeDistance=(TargetPart.Position-Bob:FindFirstChild("Torso").Position).magnitude;
BobHumanoid:MoveTo(TargetPart.Position+(TargetPart.Position-Bob:FindFirstChild("Torso").Position).unit*2,Game:GetService("Workspace"):FindFirstChild("Terrain"));
end;
if TargetModel and TargetPart and FoundHumanoid and FoundHumanoid.Health>0.001 and Bob and Bob:FindFirstChild("Torso")and(TargetPart.Position-Bob:FindFirstChild("Torso").Position).magnitude<6 and not AttackDebounce then
delay(1,function()AttackDebounce=false;end);
AttackDebounce=true;
FoundHumanoid:TakeDamage(20+math.random()*0.5);
BobHumanoidRootPart:FindFirstChild("DaggerSound").Pitch=1+math.random()*0.1;
BobHumanoidRootPart:FindFirstChild("DaggerSound"):Play();
SwingDagger:Play();
end;
else
local JumpChance=math.random(1,3500);
local RandomWalk=math.random(1,15000);
if Bob and BobHumanoid and JumpChance==1 then
BobHumanoid.Jump=true;
end;
if Bob and BobHumanoid and RandomWalk==1 then
BobHumanoid:MoveTo(game:GetService("Workspace"):FindFirstChild("Terrain").Position+Vector3.new(math.random(-2048,2048),0,math.random(-2048,2048)),Game:GetService("Workspace"):FindFirstChild("Terrain"));
wait(math.random (1,2))
RandomWalk=0
end;
end;
end;
end;
end;
--[[ By: Brutez. ]]--