while loop wont work inside of the other while loop - lua

Question

I'm scripting in roblox lua and when I try to put a while loop in the first it messes up the first sequence of code can someone give me hand in fixing this?
The problem is that when the humanoid makes it to tar2 he stops there and wont move I want him to continue running to the points but while also having it so where if a actual person comes by then he runs after him instead.
local larm = script.Parent:FindFirstChild("Left Arm")
local rarm = script.Parent:FindFirstChild("Right Arm")
local plr = game.Players:GetChildren()
local tar1 = game.Workspace.tar1
local tar2 = game.Workspace.tar2
local tar3 = game.Workspace.tar3
local tar4 = game.Workspace.tar4
local pos = {tar1, tar2, tar3, tar4}
local char = script.Parent
local Hum = char.Humanoid
torso = char.Torso
GoTo = 0
while true do
wait(1)
if GoTo == 0 then
Hum:MoveTo(pos[1].Position)
end
if (torso.Position - pos[1].Position).magnitude < 5 then
GoTo = 1
end
if GoTo == 1 then
Hum:MoveTo(pos[2].Position)
end
if (torso.Position - pos[2].Position).magnitude < 5 then
GoTo = 2
end
if GoTo == 2 then
Hum:MoveTo(pos[3].Position)
Goto = 3
end
if (torso.Position - pos[3].Position).magnitude < 5 then
GoTo = 4
end
if GoTo == 5 then
Hum:MoveTo(pos[4].Position)
end
while true do
wait(0.1)
plrs = game.Players:GetChildren()
for i,plr in ipairs(plrs) do
if plr.Character ~= nil then
tor = plr.Character.Torso
if (torso.Position-tor.Position).magnitude <= 5 then
GoTo = 0
Hum:MoveTo(tor.Position)
end
end
end
end
end

Answer 1

Coroutines! Coroutines are the bombdiggety. They let you do multiple while loops at once in a single script.
local larm = script.Parent:FindFirstChild("Left Arm")
local rarm = script.Parent:FindFirstChild("Right Arm")
local plr = game.Players:GetChildren()
local tar1 = game.Workspace.tar1
local tar2 = game.Workspace.tar2
local tar3 = game.Workspace.tar3
local tar4 = game.Workspace.tar4
local pos = {tar1, tar2, tar3, tar4}
local char = script.Parent
local Hum = char.Humanoid
torso = char.Torso
GoTo = 1
function normalCor() -- run around
while true do
wait(1)
for i=1, 4 do
if GoTo == i then
Hum:MoveTo(pos[i].Position)
end
if (torso.Position - pos[i].Position).magnitude < 5 then
GoTo = GoTo + 1
if GoTo == 5 then
GoTo = 1
end
--[[
The above _can_ be done in a single statement:
"GoTo = (GoTo+1)%4+1"
"a % 4" gets the remainder of a / 4 ]]
end
end
end
end
cr = coroutine.create(normalCor)
coroutine.resume(cr) -- this lets you do two while loops at the same time.
function aggroCor() -- when a player is nearby
while true do
wait(0.1)
plrs = game.Players:GetChildren()
for i,plr in ipairs(plrs) do
if plr.Character ~= nil then
tor = plr.Character.Torso
if (torso.Position-tor.Position).magnitude <= 5 then
GoTo = 0
Hum:MoveTo(tor.Position)
end
end
end
end
end
cr = coroutine.create(aggroCor)
coroutine.resume(cr)
Roblox has the syntax spawn(aggroCor) that you can play around with too,
if coroutine.whatever seems like too much work.