How can I fix this script to cause a gui to appear AND cause an explosion?

What I want to happen here is the player touches a brick. The brick causes a cutscene and in the cutscene, I want a GUI to appear on a computer screen that the cutscene is looking at. Then I want an explosion to appear after that.

-- Variables --
local explosion = script.Parent.Parent.Parent.Computer.Screen.Explosion
local hello = script.Parent.Parent.Parent.Computer.Screen.Error.Text
-- Variables --

function OnTouched(hit)
	wait(2)
	if hello.Visible == false then -- Enables the text on computer screen --
		hello.Visible = true
	wait(2)
	explosion.Visible = true -- Causes the explosions --
	end
end

script.Parent.Parent.Parent.Chair.Seat.Touched:Connect(function(OnTouched)