Create a message from randomized rows from 4 lists

[imdudchenko]

Hello Friends, I want to create and sent a message from google voice account, the message will be from 4 parts, will take a random text line from list 1 another random text from list 2, another random text from list 3 and another random text from list 4, in the lists will be 10 or 100 lines for example, dosen't matter, I need to take a random line from every list to create the message. I used mix line when i had create the lists but the message is create random only after the program open another thread.
Thank you so much! url)