Here's a variation using the Time Offset feature of the Step Effector, as with Jops' example, you can adjust the spacing in the Step Effector's position parameters. But this version uses the Time Offset function as a delay.
Step Effector-Time Offset.c4d
in this file you find the priciples. first is a memory node to make the delay and after that the vector gets split into its xyz values to add depth.
I hope you find it from here.
best regards
Jops
position_delay.c4d