Weird GUI problem?

I have a script that when fired, makes a certain GUI visible. The script does what its told, and the "Visible" boxs becomes Checked when the script fires, yet the GUI still remains invisible

cam = game.Workspace.cam

game.StarterGui.Cameras:WaitForChild("static")

cam.Changed:connect(function()
	if cam.Value ~= 0 then
		game.StarterGui.Cameras.static.Visible = true
		local m = math.random(.01,.07)
		while true do
			wait(.1)
			game.StarterGui.Cameras.static.ImageTransparency = m
		end
	end
end)

Help?

math.random can only make integer

--[[line 08]]  local m=math.random(1,7)/10

math.random(low, high) requires that low and high be integers. If they're not, it just rounds[^1] them. It then picks an integer between low and high.

Much of the time, that's what you want -- it makes it easy to pick things from a list, etc.

If you want to have non-integer random numbers, you could just scale down, e.g.

math.random(1, 7) / 100
-- pick one of 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07

However, this is not necessarily clear, and it can't pick any number, it can only pick a handful. You could add more by tacking on more 0s...

math.random(100, 700) / 10000

but that's obviously not elegant.

If you want any random number, you should use math.random() which returns a random number between 0 and 1 (include 0, but not including 1). Thus to get a range from low to high, it looks something like

low + math.random() * (high - low)

In your case, that's

0.01 + math.random() * 0.06

[^1]: It looks like it's round-towards-even, though that might not be platform independent