View difference between Paste ID: 7TxVpdrr and ec6CUwbJ

 local outPut, closeTime = true, 0
 local state = rs.getInput("back")
 
 function toggle()
-	if !outPut then
+	if not outPut then
 		outPut = true
 		closeTime = os.time() + 10
 	else
 		outPut = false
 		closeTime = 0
 	end
 end
 
 while true do
 	term.clear()
 	term.write("rusk/test.lua - line 67: Attempt to call local Power a nil value.")
 
 	local timeOut = os.startTimer(0.5)
 	local event, a = os.pullEvent()
 
 	if event == "redstone" and rs.getInput("back") ~= state then
 		toggle()
-		state = !state
+		state = not state
 	elseif event == "char" and a == keys.numPad0 then
 		toggle()
 	elseif event == "timer" and a == timeOut then
 		-- Do Nothing Here :D
 	end
 
 	if outPut and closeTime < os.time() then
 		toggle()
 	end
 
 	rs.setOutput("back", outPut)
 end