Is possible to use LDR?

Hi!
I have question. I want to put in my current LDR module (photo resistor) and laser LED. I want to make if the brightness came to LDR to stop my DC motor from working (stepper motor continues to work), if is dark, the current continues to work (all components working). If somebody has an idea how to do it let me know please.projekt_miha.xodball (14.3 KB)