local awful = require "awful"
local gshape = require "gears.shape"
local wibox = require "wibox"

awful.popup {
    width = 300,
    shape = function(cr, _, height)
        gshape.rectangle(cr, 200, height)
    end,
    border_color = "#ff0000",
    border_width = 10,
    placement = awful.placement.centered,
    widget = {
        widget = wibox.container.background,
        bg = "#00ff00",
        fg = "#0000ff",
        {
            widget = wibox.widget.textbox,
            text = ("testing"):rep(10, "\n")
        }
    }
}