Script runs without even clicking a button?

I have a script that has script.Parent:MouseButton1Click:Connect(), but it still runs without the player even clicking the button, how could i fix this problem? There is no error output, it just runs.

local playerGui = game.Players.LocalPlayer:FindFirstChild("playerGui")
local weaponScreen = game.Players.LocalPlayer.PlayerGui:WaitForChild("weaponScreen")
script.Parent.MouseButton1Click:Connect()
game.Players.LocalPlayer.PlayerGui.weaponScreen.Enabled = true
script.Parent.Parent.Parent.weaponScreen.loadoutBG.Visible = false
script.Parent.Parent.Parent.mainOverlay.dBG.Visible = false
script.Parent.Parent.Parent.mainOverlay.wBG.Visible = false
script.Parent.Parent.Parent.mainOverlay.weaponsButton.Visible = false
script.Parent.Parent.Parent.mainOverlay.weaponsButton.Visible = false