ELI5: Explain Like I'm 5

JAB Code

Jab code is a way of writing secret messages that only you and your friends can understand. It uses a special code made up of only two kinds of marks - an X and an O. To write a message, you start by choosing different combinations of X's and O's to represent each letter of the alphabet. For example: XOXO could mean A, OXXO could mean B and so on. To write your message, just put the combinations together like a secret code. Your friends can figure out the message by using the same code.