How to generate unique random numbers or variables for a request in jmeter for load test?

I have 2 thread group and 1 request . I am trying to execute the same request 5 times with 5 different values. I am using the function ${__time()}. But this generates random value but its the same for all 5 request.Can someone help with this?

Solutions tried:  ${__time()}., ${__Random(0000,9999)}