MATLAB: The art of delaying (discrete)

simulinksimulink delay discrete

Hi everyone
Simple newbi question on discrete signals. How can a discrete signal of sample time T can be delayed by a delay = T/4 ?
I am trying to use the delay block but I can only delay by an integer of the sample time. I am afraid my vision of "delay" is not correct.
Thank you very much for any kind of help on that.