How do I make this script follow the player?

I'm a beginner scripter I created this script for my ai that finds closest player but it doesn't follow the players

local PathfindingService = game:GetService("PathfindingService")
local robot = script.Parent
local humanoid = robot.Humanoid
local maks = 500
function gtp()
	local cp = robot.HumanoidRootPart.Position
	local p = game.Players:GetChildren()
	for i,v in pairs(p) do
		local pos = p.Character.HumanoidRootPart.Position
		local mpos = math.min(cp-pos)
		if mpos <= maks then
			
			local path = PathfindingService:CreatePath()
			path:ComputeAsync(cp,pos)
			local waypoints = path:GetWaypoints()
			for _,waypoint in pairs(waypoints) do
				humanoid:MoveTo(waypoint)
				humanoid.MoveToFinished:Wait()
			end
			break
		end

	end
	
end