local LibCore = LibStub("LibScriptableLCDCoreLite-1.0")
local WidgetText = LibStub("LibScriptableWidgetText-1.0")

-- Create a text that we'll "draw" on. aka, text:SetText()
local ctx = UI.CreateContext("My Context")
local text = UI.CreateFrame("Text", "My Text", ctx)
text:SetPoint("CENTER", UIParent, "CENTER")
text:SetVisible(true)
text:SetFontSize(50)
text:SetBackgroundColor(0, 0, 0, 1)

-- Create our "core" object. 
-- This just simply fills "envrionment" with plugin functions.
local environment = {}
local visitor = LibCore:New(environment, "My Core")

-- First we give it a name, then a config. 
-- This is a 1 second repeating widget.
local name = "My Widget"
local config = {
    value="return floor(rand(100))", -- This is your Lua script.
    color="return ClassColor(unit)", -- unit is provided by widget:Start("player")
    repeating = true, -- This widget repeats till widget:Stop() is called.
    update = 1000, -- Update at 1 second intervals
}
local col, row, layer = 0, 0, 0 -- These are for convenience and optional.
local errorLevel = 3 -- Most verbose.

-- we provide the widget with a "draw" callback. 
-- This is called at the end of each refresh. In our case, every second.
local function callback(widget)
     text:SetText(widget.buffer or "")
     text:ResizeToText()
     text:SetFontColor(widget.color.ret1, widget.color.ret2, widget.color.ret3)
end

-- Create the widget
local widget = WidgetText:New(visitor, name, config, row, col, layer, errorLevel, callback)


-- Make sure player's available before calling ClassColor(unit).
table.insert(Event.Unit.Available, { function()
    widget:Start("player")
end, "Example", "System loaded..."})