How do I randomize Vector3?

I'm trying to organize my vectors into a table and I'm unsure what the problem it and why it won't pull out the vectors. Can someone help?

local vector1 = Vector3.new(-40, 50, 30)
local vector2 = Vector3.new(20, 60, 30)
local vector3 = Vector3.new(100, 60, 30)
local vector4 = Vector3.new(200, 60, 30)
local vector5 = Vector3.new(90, 40, -20)
--local vector6 =
--local vector7 =

local vectors = {vector1, vector2, vector3, vector4, vector5}

while true do
	wait(math.random(1,10))
	game.Workspace.Explosion:Play()
	explode = Instance.new("Explosion",game.Workspace)
	explode.BlastPressure = 5
	explode.BlastRadius = 20
	explode.ExplosionType = "NoCraters"
	explode.Position = math.random(1,#vectors)
end