[lightspark]

Here's a small demo:

local frame = CreateFrame("Frame")
local textsToAnimate = {}
 
local function OnUpdate(self, elapsed)
    for _, text in pairs(textsToAnimate) do
        text:UpdateAnimatedValue(elapsed)
    end
end
 
frame:SetScript("OnUpdate", OnUpdate)
 
frame:SetScript("OnEvent", function()
    local text = UIParent:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
    text:SetPoint("CENTER", -128, 64)
    Mixin(text, AnimatedNumericFontStringMixin)
    table.insert(textsToAnimate, text)
 
    text = UIParent:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
    text:SetPoint("CENTER", -128, 32)
    Mixin(text, AnimatedNumericFontStringMixin)
    table.insert(textsToAnimate, text)
 
    text = UIParent:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
    text:SetPoint("CENTER", -128, 0)
    Mixin(text, AnimatedNumericFontStringMixin)
    table.insert(textsToAnimate, text)
 
    text = UIParent:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
    text:SetPoint("CENTER", -128, -32)
    Mixin(text, AnimatedNumericFontStringMixin)
    table.insert(textsToAnimate, text)
 
    C_Timer.NewTicker(2, function()
        for _, text in pairs(textsToAnimate) do
            text:SetAnimatedValue(math.random(10, 10000))
        end
    end)
end)
 
frame:RegisterEvent("PLAYER_LOGIN")