Pausing and resuming loops?

Trying different options now for a while and I just can't find a way, so i'm going to ask here. I'm trying to create a button that when it's pressed (on a gui) lights flash every one second, for a plane. So when your sitting in a cockpit you press the lights button and on the wings lights start flashing. I'm a beginner scripter but this is what I've tried for the button, on a brick:

function onClicked()
    script.Parent.Parent.Light.Script.Disabled = true

script.Parent.ClickDetector.MouseClick:connect(onClicked)

end

and this is the loop on the light brick:

while true do
    script.Parent.PointLight.Enabled = true
    wait(1)
    script.Parent.PointLight.Enabled = false
    wait(1)
end

Any help would be appreciated Thanks Light