wavePlayer question

i was playing with this thing for a couple of houres but i cant figure out how to create a simple beat machine using one kick samlpe.
i have spread the position node and made 4 values in a range betwen 0 and 1, so i have some kind of a 4 beat sequencer. problem is how to slow the whole composition?

or how could you slow down frequency of a single looping sample?