Does Anyone Know How I Can Get This Follow Script To Find a Specific Player?

So Basically what im trying to do is get this script t only follow 1 player around at all times. Does anyone know how I can accomplish this? I dont want it to follow every player on the map I just want it to follow whatever player I assign it too. Here is the script:(Thanks in Advance For Any Help)

bin = script.Parent

function move(target)
	local dir = (target.Position - bin.Position).unit
	local spawnPos = bin.Position
	local pos = spawnPos + (dir * 1)
	bin:findFirstChild("BodyGyro").cframe = CFrame.new(pos,  pos + dir)
	bin:findFirstChild("BodyGyro").maxTorque = Vector3.new(9000,9000,9000)
end

function moveTo(target)
	bin.BodyPosition.position = target.Position
	bin.BodyPosition.maxForce = Vector3.new(10000,10000,10000) * bin.Speed.Value
end

function findNearestTorso(pos)
	local list = game.Workspace:GetChildren()
	local torso = nil
	local dist = 1000
	local dist2 = 10
	local temp = nil
	local human = nil
	local temp2 = nil
wait(2)

	for x = 1, #list do
		temp2 = list[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 - pos).magnitude < dist and (temp.Position - pos).magnitude > dist2 then
					torso = temp
					dist = (temp.Position - pos).magnitude
				end
			end
		end
	
	end
	return torso
end

function shoot(pos)
	dir = (pos - bin.CFrame.p).unit 
	for i = 1, 50 do 
		local ex = Instance.new("Explosion") 
		ex.BlastRadius = 1
		ex.Position = bin.Position + (dir * 10 * i) + (dir * 7) 
		ex.Parent = game.Workspace 
	end
end

function shootAt(torso)
	local dir = (torso.Position - bin.Position).unit
	local spawnPos = bin.Position
	local pos = spawnPos + (dir * 1)
	shoot(pos)
end

while true do
	local torso = findNearestTorso(bin.Position)
	if torso~=nil then
		move(torso)
		moveTo(torso)
	end
	wait()
end

Edit: My previous code was riddled with errors, but this one works.

local bin = script.Parent
local target = nil --Target to be chased
local run = true --Variable to cancel while loop whenever
wait(5)

local function filter(temp,min,max)
	local hum = temp:findFirstChild("Humanoid")
	local root = temp:findFirstChild("HumanoidRootPart")

	if hum == nil or root == nil then
		return false
	end
	local dist = (root.Position-bin.Position).magnitude
	print(dist)
	print(hum.Health)
	return dist < max and dist > min and hum.Health > 0
end
local function findTarget(pos)
	local list = game.Workspace:GetChildren()
	local maxDist = 1000
	local minDist = 10
	local tar = nil
	
	for i=0,#list do
		local temp = list[i]
		if temp == nil then
			
		elseif temp.ClassName == "Model" and temp ~= bin then
			if filter(temp,minDist,maxDist) then
				tar = temp
				maxDist = (tar.Torso.Position-bin.Position).magnitude
			end
		end
	end
	return tar
end
local function moveTo(tar)
	print("Moving")--Replace
end

while run do
	if target ~= nil then
		if target:findFirstChild("Humanoid") == nil or target:findFirstChild("Torso") == nil then	--Can't remember whether Lua's syntax uses !boolean
			target = findTarget(bin.Position)
		else
			moveTo(target)
		end
	else
		target = findTarget(bin.Position)
	end
	wait(5)
end

Not trying to rip on you or anything of the sort, but it seems like you didn't even read the code or don't or understand it. You could have solved it yourself if you'd just moved the torso variable outside the while loop and only fired the findNearest Torso function when the current was dead or null(nil). All I did above was the former and made it less cluttered. (Haven't tested it yet, but it should work) Edit: Changed temp in while loop to target and moved "filter" function above "findTarget" function. Java has spoiled me :D