Here's the code, it's supposed to spawn in a random stage when the timer in-game is at 1 minute and despawn it when the timer is at 0, but right now it just counts down the timer but the stages dont appear and disappear, where did i do something wrong?

local rep = game:GetService("ReplicatedStorage")
local players = game:GetService("Players")
local minutesvalue = rep:WaitForChild("Minutes")
local secondsvalue = rep:WaitForChild("Seconds")
local pickedmap = rep:WaitForChild("Pickedmap")
local minutes = 1 --minutes
local seconds = 01 --seconds
 
while true do
    minutesvalue.Value = minutes
    secondsvalue.Value = seconds
   
    repeat
        if secondsvalue.Value <= 0 then
            minutesvalue.Value = minutesvalue.Value - 1
            secondsvalue.Value = 59
        else
            secondsvalue.Value = secondsvalue.Value - 1
        end
        wait(1)
	until secondsvalue.Value <= 0 and minutesvalue.Value <= 0
	print(minutes ..":" ..seconds)
	
	if minutes > 0 and seconds > 0 then
		pickedmap.Value = math.random(1,5)
		if pickedmap.Value == 1 then
			workspace.Dodge.parts.Transparency = 0
			workspace.Dodge.parts.CanCollide = true
			workspace.Dodge.killparts.Transparency = 0
			workspace.Dodge.killparts.Script.Disabled = false
		end
		if pickedmap.Value == 2 then
			workspace.Topjump.conveyors.a.Transparency = 0
			workspace.Topjump.conveyors.b.Transparency = 0
			workspace.Topjump.conveyors.a.CanCollide = true
			workspace.Topjump.conveyors.b.CanCollide = true
			workspace.Topjump.part.CanCollide = true
			workspace.Topjump.part.Transparency = 0.3
			workspace.Topjump.killparts.Script.Disabled = false
			workspace.Topjump.killparts.Transparency = 0
		end
		if pickedmap.Value == 3 then
			workspace.Pushingaway.conveyors.a.Transparency = 0
			workspace.Pushingaway.conveyors.b.Transparency = 0	
			workspace.Pushingaway.conveyors.c.Transparency = 0
			workspace.Pushingaway.conveyors.d.Transparency = 0
			workspace.Pushingaway.conveyors.e.Transparency = 0
			workspace.Pushingaway.conveyors.f.Transparency = 0
			workspace.Pushingaway.conveyors.g.Transparency = 0
			workspace.Pushingaway.conveyors.h.Transparency = 0
			workspace.Pushingaway.conveyors.a.CanCollide = true
			workspace.Pushingaway.conveyors.b.CanCollide = true
			workspace.Pushingaway.conveyors.c.CanCollide = true
			workspace.Pushingaway.conveyors.d.CanCollide = true
			workspace.Pushingaway.conveyors.e.CanCollide = true
			workspace.Pushingaway.conveyors.f.CanCollide = true
			workspace.Pushingaway.conveyors.g.CanCollide = true
			workspace.Pushingaway.conveyors.h.CanCollide = true
			workspace.Pushingaway.part.CanCollide = true
			workspace.Pushingaway.part.Transparency = 0
			workspace.Pushingaway.killparts.Script.Disabled = false
			workspace.Pushingaway.killparts.Transparency = 0
		end
		if pickedmap.Value == 4 then
			workspace.Workingback.Conveyors.a.Transparency = 0
			workspace.Workingback.Conveyors.b.Transparency = 0
			workspace.Workingback.Conveyors.c.Transparency = 0
			workspace.Workingback.Conveyors.d.Transparency = 0
			workspace.Workingback.Conveyors.e.Transparency = 0
			workspace.Workingback.Conveyors.f.Transparency = 0
			workspace.Workingback.Conveyors.g.Transparency = 0
			workspace.Workingback.Conveyors.a.CanCollide = true
			workspace.Workingback.Conveyors.b.CanCollide = true
			workspace.Workingback.Conveyors.c.CanCollide = true
			workspace.Workingback.Conveyors.d.CanCollide = true
			workspace.Workingback.Conveyors.e.CanCollide = true
			workspace.Workingback.Conveyors.f.CanCollide = true
			workspace.Workingback.Conveyors.g.CanCollide = true
			workspace.Workingback.killparts.Script.Disabled = false
			workspace.Workingback.killparts.Transparency = 0
			workspace.Workingback.parts.Transparency = 0
			workspace.Workingback.parts.CanCollide = true
		end
		if pickedmap.Value == 5 then
			workspace.goingaround.walls.Transparency = 0
			workspace.goingaround.walls.CanCollide = true
			workspace.goingaround.ground.Transparency = 0
			workspace.goingaround.ground.CanCollide = true
		end
	end
	
	if minutes == 0 and seconds == 0 then
		if pickedmap == 1 then
			workspace.Dodge.parts.Transparency = 1
			workspace.Dodge.parts.CanCollide = false
			workspace.Dodge.killparts.Transparency = 1
			workspace.Dodge.killparts.Script.Disabled = true
		end
		if pickedmap == 2 then
			workspace.Topjump.conveyors.a.Transparency = 1
			workspace.Topjump.conveyors.b.Transparency = 1
			workspace.Topjump.conveyors.a.CanCollide = false
			workspace.Topjump.conveyors.b.CanCollide = false
			workspace.Topjump.part.CanCollide = false
			workspace.Topjump.part.Transparency = 1
			workspace.Topjump.killparts.Script.Disabled = true
			workspace.Topjump.killparts.Transparency = 1
		end
		if pickedmap == 3 then
			workspace.Pushingaway.conveyors.a.Transparency = 1
			workspace.Pushingaway.conveyors.b.Transparency = 1
			workspace.Pushingaway.conveyors.c.Transparency = 1
			workspace.Pushingaway.conveyors.d.Transparency = 1
			workspace.Pushingaway.conveyors.e.Transparency = 1
			workspace.Pushingaway.conveyors.f.Transparency = 1
			workspace.Pushingaway.conveyors.g.Transparency = 1
			workspace.Pushingaway.conveyors.h.Transparency = 1
			workspace.Pushingaway.conveyors.a.CanCollide = false
			workspace.Pushingaway.conveyors.b.CanCollide = false
			workspace.Pushingaway.conveyors.c.CanCollide = false
			workspace.Pushingaway.conveyors.d.CanCollide = false
			workspace.Pushingaway.conveyors.e.CanCollide = false
			workspace.Pushingaway.conveyors.f.CanCollide = false
			workspace.Pushingaway.conveyors.g.CanCollide = false
			workspace.Pushingaway.conveyors.h.CanCollide = false
			workspace.Pushingaway.part.CanCollide = false
			workspace.Pushingaway.part.Transparency = 1
			workspace.Pushingaway.killparts.Script.Disabled = true
			workspace.Pushingaway.killparts.Transparency = 1
		end
		if pickedmap == 4 then
			workspace.Workingback.Conveyors.a.Transparency = 1
			workspace.Workingback.Conveyors.b.Transparency = 1
			workspace.Workingback.Conveyors.c.Transparency = 1
			workspace.Workingback.Conveyors.d.Transparency = 1
			workspace.Workingback.Conveyors.e.Transparency = 1
			workspace.Workingback.Conveyors.f.Transparency = 1
			workspace.Workingback.Conveyors.g.Transparency = 1
			workspace.Workingback.Conveyors.a.CanCollide = false
			workspace.Workingback.Conveyors.b.CanCollide = false
			workspace.Workingback.Conveyors.c.CanCollide = false
			workspace.Workingback.Conveyors.d.CanCollide = false
			workspace.Workingback.Conveyors.e.CanCollide = false
			workspace.Workingback.Conveyors.f.CanCollide = false
			workspace.Workingback.Conveyors.g.CanCollide = false
			workspace.Workingback.killparts.Script.Disabled = true
			workspace.Workingback.killparts.Transparency = 1
			workspace.Workingback.parts.Transparency = 1
			workspace.Workingback.parts.CanCollide = false
		end
		if pickedmap == 5 then
			workspace.goingaround.walls.Transparency = 1
			workspace.goingaround.walls.CanCollide = false
			workspace.goingaround.ground.Transparency = 1
			workspace.goingaround.ground.CanCollide = false
		end
	end
end