why does my math.random not change the text of a gui? i did define all variabeles

while true do
    local r = math.random(1,8)
if r == 1 then
    print("2s")
        t = "Found a bug or have something to share? Join our group! (link is in the description)"
    end
if r == 2 then
    print("2ss")
        t = "Tip: Leveling up skills is important! "
    end
if r == 3 then
    print("sss2")
        t = "Tip: Bosses can be tough, upgrade your sword to fight easier!"
    end
if r == 4 then
    print("2ssss")
        t = "Tip: Mining can be tough, upgrade your pickaxe to mine better ores and mine them faster!"
    end
if r == 5 then
    print("2sssss")
        t = "Tip: Digging can be tough, upgrade your shovel to dig faster!"
    end
if r == 6 then
    print("2ssssss")
        t = "Tip: If your really low, you can drink a potion before you die to reheal you! Or you can buy the 'fill healthbar' gamepass. "
    end
if r == 7 then
    print("2sssssss")
        t = "Tip: Bosses drop seldom loot"
    end
if r == 8 then
    print("2ssssssss")
        t = "Tip: Buying Gamepasses will help you alot, so will it to us!"
    end
    wait(3)

end

so i am trying to make like it shows tips inside a game and this is in a loading screen btw but it never works it never write the text. please help me thank you