ACC Staz. Salekhard

print("APPARATO CENTRALE COMPUTERIZZATO - SALEKHARD")
print("")
print("Engine running:")print(redstone.getInput("back"))


local tOptions = {"Deviato", "Corr. Tracc.", "TLBCA PB11"} -- Add menu options here.
local selection = 1

while true do
term.clear()
x,y = term.getSize()
y = (y - #tOptions)/2
term.setCursorPos(x,y)
for i = 1, #tOptions do
  if i == selection then
   scrap,y = term.getCursorPos()
   x, scrap = term.getSize()
   x = (x-#tOptions[i])/2 - 3
   term.setCursorPos(x,y)
   print(">> "..tOptions[i].." <<")
  else
   scrap,y = term.getCursorPos()
   x, scrap = term.getSize()
   x = (x-#tOptions[i])/2
   term.setCursorPos(x,y)
   print(tOptions[i])
  end
end
event, key = os.pullEvent("key")
if key == 208 or key == 31 then
  selection = selection + 1
end
if key == 200 or key == 17 then
  selection = selection - 1
end
if selection > #tOptions then
  selection = 1
end
if selection < 1 then
  selection = #tOptions
end
end

local function menu(...)
        local sel = 1
        local list = {...}
        local offX,offY = term.getCursorPos()
        local curX,curY = term.getCursorPos()
        while true do
                if sel > #list then sel = 1 end
                if sel < 1 then sel = #list end
                for i = 1,#list do
                        term.setCursorPos(offX,offY+i-1)
                        if sel == i then
                                print("["..list[i].."]") -- very customisible example print(">"..list[i])
                        else
                                print(" "..list[i].." ") -- very customisible
                        end
                end
                while true do
                        local e,e1,e2,e3,e4,e5 = os.pullEvent()
                        if e == "key" then
                                if e1 == 200 then -- up key
                                        sel = sel-1
                                                break
                                end
                                if e1 == 208 then -- down key
                                        sel = sel+1
                                                break
                                end
                                if e1 == 28 then
                                        term.setCursorPos(curX,curY)
                                        return list[sel],sel
                                end
                        end
                end
        end
end

function Option1()
  redstone.setOutput("back", true)
    print("Starting engine...")
  sleep(2)
end

function Option2()
redstone.setOutput("back", false)
print("Stopping engine...")
  sleep(2)
end

function Option3()
redstone.setOutput("left", true)
  print("Door opened")
  sleep(5)
redstone.setOutput("left", false)
end

while true do
        local selection = menu(
        "Option 1",
        "Option 2",
        "Option 3")
        if selection == "Option 1" then
         Option1()
        elseif selection == "Option 2" then
         Option2()
        elseif selection == "Option 3" then
         Option3()
        end
end