How do i make a random value lower than a specific number value?

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So i have 3 random number

local random1 = math.random(1,10)
local random2 = math.random(1,10)
local random3 = math.random() -- or math.random(0,1)

Now let's say if the value of the random3 is 0 then the value of random1 and random2 can be anywhere between 1 and 10, but if the value of random3 is 1 then the value of random2 must be lower than random1. But the value of random 1, 2 must always be between 1 and 10.

local random3  = math.random()
if random3 == 0 then
	local random1 = math.random(1,10)
	local random2 = math.random(1,10)
else -- or else if random3 == 1 then
	local random1 = math.random(2,10)
	local random2 =
end

Now the question is in line 7, how do i make the value lower than the value i get on random1, for example if i get the value of 5 on random1 then the value of random2 must be lower than 5 which means it must be between 1 and 4, i also made the random1 get a value between 2,10 because if it gets 1 then that won't work because there isn't anything lower than 1 that is higher than 1.

I mean i could do this

local random3  = math.random()
if random3 == 0 then
	local random1 = math.random(1,10)
	local random2 = math.random(1,10)
else -- or else if random3 == 1 then
	local random1 = math.random(2,10)
	repeat
		local random2 = math.random(1,9)
	until random2 < random1
end

it would work but if there is an alternative way other than using repeat or a long list of "if else" then i would take it. And also i need to change 2 textlabel from the 2 random values so, the current script would be like this.

local number1 = workspace.Number1.SurfaceGui.TextLabel
local number2 = workspace.Number2.SurfaceGui.TextLabel

local function variable ()
	local random3  = math.random()
	if random3 == 0 then
		local random1 = math.random(1,10)
		local random2 = math.random(1,10)
		number1.Text = tostring(random1)
		number2.Text = tostring(random2)
	else -- or else if random3 == 1 then
		local random1 = math.random(2,10)
		number1.Text = tostring(random1)
		repeat
			local random2 = math.random(1,9)
			number2.Text = tostring(random2)
		until random2 < random1
	end
end

anyeventlistener:Connect(variable)

So overall the problem is.. How do i make a random value lower than another random value