Exploding Gui isn´t working?

Hi there Biocommand here, What I am trying to do is a gui that when you click on it it makes you explode and cause damage in buildings, etc. I have already made the code but it isn´t working is anything wrong here?

script.Parent.MouseButton1Down:connect(function()
    function explode(player)
    print("exploding player")
    character = game.Workspace:findFirstChild(player.Name)

    local explosion = Instance.new("Explosion")--Creates The Explosion.
    explosion.Position = character.Torso.Position --Where The Explosion Is.
    explosion.BlastRadius = BlastRad
    explosion.Parent = game.Workspace --It Has To Be Visible Correct?

end
end)