Mean of 5 data at a time

Hi, 

I have a while loop where I collect data each seconds from a data acquisition system who is connected to my instrument. 

I would like to show in the front panel a means of 5 data which is the rate of shearing.

Each time 5 more data are collected, I would like it to discard the 5 previous data and do a new means with those 5 new data. 

I thought about wait function but I already have one in the while loop so I am able to acquire data each second. 

Thanks!