Creating a Rectangular Grid

OS (e.g. Win10):
PsychoPy version (e.g. 1.84.x):
Standard Standalone? (y/n) If not then what?:
What are you trying to achieve?:

Hi everyone,

Could you let me know how I can program a rectangular grid with 25 cells? I want to show random stimuli on each cell. Tnx.

Something like this?