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The issue is within the checkPassword function definition. Change the '&' symbol to the 'and' keyword. This should resolve the current error.

This should do what you want. I didn't test it so it may not work. Just reply with the error message if it doesn't work. local component = require("component") local r = component.redstone local term = require("term") local text = require("text") ---- config section local password = { pw_open = "openMe", pw_close = "closeMe" } local side = 5 --side of the door ----- local open = false local input_password local function checkPassword(i_password) if (i_password == password.pw_open & open == false) then return true elseif (i_password == password.pw_close & open == true