Problem with random numbers

Other
#1

The problem is the following…

Al iniciar la aplicación genero dos numeros random   del 1 al 13 .

the application creates but the problem is when entering the application for the second time, the random numbers generated are the same as in the first admission and are on the same

donot what the problem help please

CODE:

local num=0

num = math.random( 1, 13 )

#2

set a seed

https://docs.coronalabs.com/daily/api/library/math/randomseed.html

math.randomseed( os.time() ) -- do once, before using math.random() for first time
#3

I served your help

Thank you very much friend

#4

set a seed

https://docs.coronalabs.com/daily/api/library/math/randomseed.html

math.randomseed( os.time() ) -- do once, before using math.random() for first time
#5

I served your help

Thank you very much friend