How to make an voting system?

To start off, you'll need to learn how to make a GUI. ROBLOX provided a tutorial on how to make one. After you learn that, you'll just need to know some loop to get it in ever player's GUI (If you want it to happen at a certain time) such as..

plrs = game.Players:GetChildren()
for i,v in pairs(plrs) do
game.ServerStorage.GUI:clone().Parent = v
end

Otherwise, just put it in StarterGui.

Please do not ask for people to make scripts. Thats not what this website is for.

But if i put...

function onClick()
value = value + 1
if value.most then
    thing1 = true
else
    thing1 = false
end