Help With Script That Weld's To Player When They Connect?

Hello can someone help me with this script my friend gave me? its a weld script, that when you touch the part it welds to your torso. But it only works when you touch it can someone help me do it when someone connects to the game? thanks.

I'm really new to lua and just needed that script to test out my gui i made.

script.Parent.Touched:connect(function(hit)
 humanoid = hit.Parent:findFirstChild("Humanoid")
 if humanoid then
  head = hit.Parent.Torso
  script.Parent.CFrame = head.CFrame * CFrame.new(-0.8,1,-0.0008)
  weld = Instance.new ("Weld")
  weld.Part0 = head
  weld.C0 = head.CFrame:inverse()
  weld.Part1 = script.Parent
  weld.C1 = script.Parent.CFrame:inverse()
  weld.Parent = script.Parent  
  script.Parent.Anchored = false
 end 
end)