PIR sensor deactivated stepper motor

Hi I'm completely new to arduino, and I'm working on a project that is supposed to have a stepper motor that does an looped up and down motion and PIR sensor that deactivates it . I don't know where to start or what to do, can anyone please help me. I would be most grateful.

Start small.
Figure out how to connect the PIR sensor to your Arduino and get some code going that reads the sensor and reports its state. You may even want to start smaller and use an example to blink the on-board LED. It depends upon your experience with Arduino and your experience in general.

Too big and you will hurt yourself and your project.

Take a look into this tutorial:

Arduino Programming Course

It is easy to understand and has a good mixture between explaining important concepts and example-codes to get you going. So give it a try and report your opinion about this tutorial.

best regards Stefan