Probe basic toolchanger

Hello,

I am currently trying to get the toolchanger working with probe basic. It works however the subroutine (m13) is made for a continuous motor. This machine uses a stepper motor, with a custom stepper driver. If I enable one relay it moves the carousel one pocket. The relay needs to deactivate before it can be repeated. There is another relay to change the direction. I was wondering for the homing of the carrousel, is there a good way of doing this?
Like a while loop which activates the relay, waits a little bit and deactivates it until the home sensor is activated?