[Lua] [Error] Please help

Hey, I'm have an code and it's don't saying any error but it don't work please help.
Informations:
Code1(startup):

while true do
   if rs.getInput("left") == true then
	shell.run("menu")
   end
   sleep(0)
end

Code2(menu):

rs.setOutput("top", true)
mon = peripheral.wrap("back")
local function off()
  mon.clear()
  os.shutdown()
  rs.setOutput("top", false)
end
mon.setTextScale(2)
while true do
   if rs.getInput("left") == true then
	  off()
   end
   rin = rs.getBundledInput( "front" )
   if colors.test( rin, colors.lime) == true then
	  mon.setCursorPos(1,1)
	  mon.clearLine()
	  mon.write("Zasilanie: 100%")
	 elseif colors.test( rin, colors.yellow) == true then
	  mon.setCursorPos(1,1)
	  mon.clearLine()
	  mon.write("Zasilanie: 75%")
	 elseif colors.test( rin, colors.lightBlue) == true then
	  mon.setCursorPos(1,1)
	  mon.clearLine()
	  mon.write("Zasilanie: 50%")
	 elseif colors.test( rin, colors.magenta) == true then
	  mon.setCursorPos(1,1)
	  mon.clearLine()
	  mon.write("Zasilanie: 25%")
	else
	  mon.setCursorPos(1,1)
	  mon.clearLine()
	  mon.write("Zasilanie: 0%")
   end
  if colors.test( rin, colors.white) == true then
	 mon.setCursorPos(1,2)
	 mon.clearLine()
	 mon.write("Quarry: Wlaczone")
	else
	 mon.setCursorPos(1,2)
	 mon.clearLine()
	 mon.write("Quarry: Wylaczone")
   end
  sleep(0.2)
end

picture:


If you can please help !

(I'm from poland and this is in Polish language.)

Don't you mean that the monitor is on the other side, instead of the button?

no only code2

local function off()
  mon.clear()
  os.shutdown()
  rs.setOutput("top", false)
end

and

if rs.getInput("left") == true then
		  off()

(this code broken all other with the button i think :(/>/>)