Generate a random number, but every random seconds in LUA/Love2d - random

Question

I am trying to generate a random number, every random seconds (the final purpose would be to change the color of a block from time to time, randomly).
For that, I am using the Hump library (http://vrld.github.io/hump/#hump.timer).
Here is my code at the moment, I am true beginner in LUA/Love2d coding.
It generates a number, and displays it every seconds, instead of every random seconds... (but the random seconds is also generated).
I don't really understand why it is not working.
local Timer = require "timer"
function love.load()
text="t"
number2=1
end
local f = function()
math.randomseed(os.time())
number = math.random( 2,10 )
text="in " .. number2 .. " seconds (random)... random number =" .. number
return true
end
function love.update(dt)
number2 = math.random( 2,4 )
Timer.update(number2)
Timer.addPeriodic(number2, f)
end
function love.draw()
love.graphics.print( text, 330, 300 )
end
Thanks for any help !

Answer 1

While I am not familiar with Hump, it seems that you can easily use the timer's add function for your purpose, as it will call the function exactly once after x seconds, allowing you to schedule the next execution with a different delay:
local timer = require("timer")
local text = ""
local function tick()
-- Generate random number
local newNumber = math.random(2, 10)
local newDelay = math.random(2, 4)
text = ("Current number: %d, next in %d seconds!"):format(newNumber, newDelay)
-- Actually schedule the next call
timer.add(newDelay, tick)
end
function love.load()
tick()
end
function love.update(dt)
timer.update(dt)
end
function love.draw()
love.graphics.print(text, 330, 300)
end