Screen GUI, Image Button not teaming and killing player, why?

So when you click a certain button on the GUI, it is meant to team you to a certain team.

Visible

while true do
	wait(10)
	script.Parent.Visible = true
end

RGH

local groupid = "1142229"
function Click(Player)
    if Player:IsInGroup(groupid) then
        Player.TeamColor = BrickColor.new("Institutional white")
		Player.Humanoid.Health = 0
    else 
end
end
script.Parent.MouseButton1Click:connect(Click)

PMC

local groupid = "2567972"
function Click(Player)
    if Player:IsInGroup(groupid) then
        Player.TeamColor = BrickColor.new("Lime green")
		Player.Humanoid.Health = 0
    else 
end
end
script.Parent.MouseButton1Click:connect(Click)

TRGH

local groupid = "2580112"
function Click(Player)
    if Player:IsInGroup(groupid) then
        Player.TeamColor = BrickColor.new("Navy blue")
		Player.Humanoid.Health = 0
    else 
end
end
script.Parent.MouseButton1Click:connect(Click)

SGH

local groupid = "2586305"
function Click(Player)
    if Player:IsInGroup(groupid) then
        Player.TeamColor = BrickColor.new("Earth green")
		Player.Humanoid.Health = 0
    else 
end
end
script.Parent.MouseButton1Click:connect(Click)

You keep putting Player as the parameter, but the MouseButton1Click event doesn't have any built-in parameters.

Therefore Player will always be nil.

The solution is super easy. LocalScripts (which these all should be - they're in GUIs, after all.) have access to the LocalPlayer property, so we can just use that to get the person clicking.

local Player = game.Players.LocalPlayer

---all your other stuff