make-id-file

local h = fs.open("id", "w")
textutils.slowWrite("enter the id of the door control computer: ",10)
id = read()

h.write(id)

h.close()

local w = fs.open("id", "r")
id3 = w.readLine()
id2 = tonumber(id3)
textutils.slowPrint("the id written to file is: "..id2)

w.close()