How i can control two arduino cars with android?

Hi! I want to know how i can control 2 arduino cars with wifi. I have the code with which I can control one car. I'm using arduino uno, wifi module ESP 8266.

I have attached my arduino and android code. Thanks

uno_tank.ino (2.65 KB)

What do you mean with controlling 2 cars?
Does 1 phone control 2 cars, or do you want 2 phones to control a car each?
Also, do you connect the ESP8266 to a wifi access point or does it act like a wifi access point?