After waiting for the break of dawn and seeing no movements from the portal. Ed was forced to give up.
'I can't stay here' If he stayed any longer he would be wasting valuable time. Still. That didn't mean he could just abandon his skeleton body right then and there.
Ed decided to create a simple pressure plate before leaving. The plate would be pressed down connecting the runes drawn on the ground and thus activating the array on the ceiling.
This was a quick fix and Ed didn't mean to cause much harm with it. It was at the level of pestering if anything.
It was easy to set up and with that done, Ed turned away from the ruins and began to walk away towards what he presumed was the right direction. Without a compass, it was impossible to get anything exact but Ed did his best by using the only star in the sky. The sun.
After walking in the tall grass and encountering nothing much along the way, Ed finally stopped.