How do i make a wall/brick that respawns when moved after a 30s delay?

Save the original position in either a Value object or a variable in your script that moves the part, then moves it back after 30 seconds

but i mean if a player moved it not a script so a player moves the brick, then after 30s the brick goes back to the original place

You could check when the position of it changes, and when it does, wait 30 seconds and move it back

https://developer.roblox.com/en-us/api-reference/function/Instance/GetPropertyChangedSignal

If you have a script please edit the question then put the script in the queastion so we can assist you

i dont have a script