CathTool / Omnitool scripting error

[Hypercube]

Hmm... so I am making a map, purely for testing, but I may release it on the workshop, the ending basically goes: use omnitool on panel, opens elevator doors, walk inside, use omnitool on another panel, but that's where I'm stuck at. How would I get the second omnipanel to close the elevator door? Either I do that or I simply use the trigger area to close the doors behind. I sort of want the screen to fade to black as well, because I think that'd suit the moment.