Enchanted menu

local width, height = term.getSize()
print("width: ", width, "\n", "height: ", height)
sleep(1)
local selectedMenu = 1
local selectedItem = 1
local running = true

function clear()
term.clear()
term.setCursorPos(1,1)
end

function choice1()
clear()
print("valasztott menu: 1")
print("key: ", key)
print("menu", menu)
print("selectedItem: ", selectedItem)
event, key = os.pullEvent("key")
end

function choice15()
selectedItem = 1
selectedMenu = 2
end

function choice22()
selectedItem = 1
selectedMenu = 1
end

function Exit()
 running = false
end

local mainMenu1 = {
[1] = { text = "menu1", handler = choice1 },
[2] = { text = "menu2", handler = choice2 },
[3] = { text = "menu3", handler = choice3 },
[4] = { text = "menu4", handler = choice4 },
[5] = { text = "menu5", handler = choice5 },
[6] = { text = "menu6", handler = choice6 },
[7] = { text = "menu7", handler = choice7 },
[8] = { text = "menu8", handler = choice8 },
[9] = { text = "menu9", handler = choice9 },
[10] = { text = "menu10", handler = choice10 },
[11] = { text = "menu11", handler = choice11 },
[12] = { text = "menu12", handler = choice12 },
[13] = { text = "menu13", handler = choice13 },
[14] = { text = "menu14", handler = choice14 },
[15] = { text = "menu15", handler = choice14 },
[16] = { text = "menu16", handler = choice14 },
[17] = { text = "menu17", handler = choice14 },
[18] = { text = "menu18", handler = choice14 },
[19] = { text = "tovab2", handler = choice15 },
[20] = { text = "Exit20", handler = Exit }
}

local mainMenu2 = {
[1] = { text = "menu1", handler = choice21 },
[2] = { text = "tovabb1", handler = choice22 },
[3] = { text = "Exit20", handler = Exit }
}

function printMenu( menu )
  for i=1,#menu do
    if i < height then
      if i == selectedItem then
        term.setCursorPos(1, (i))
        print(">> "..menu[i].text .. " <<")
      else
        term.setCursorPos(1, (i))
        print("   "..menu[i].text)
      end
    elseif i > height - 1 then
      if i == selectedItem then
        term.setCursorPos(10, (i-18))
        print(">> "..menu[i].text .. " <<")
      else
        term.setCursorPos(10, (i-18))
        print("   "..menu[i].text)
      end
    end
  end
end

function onKeyPressed( key, menu )
term.setCursorPos(35,18)
print("keypressed: ", key)
sleep(.01)
 if key == 28 then
  onItemSelected(menu)
 elseif key == 200 then
  if selectedItem > 1 then
   selectedItem = selectedItem - 1
  end
 elseif key == 208 then
  if selectedItem < #menu then
   selectedItem = selectedItem + 1
  end
 elseif key == 203 then
  if selectedItem > 18 then
   selectedItem = selectedItem - 18
  end
 elseif key == 205 then
  vissza = selectedItem
  if selectedItem < #menu then
   selectedItem = selectedItem + 18
    if selectedItem > #menu then
      selectedItem = vissza
    end
  end
 end
end

function onItemSelected( menu )
 menu[selectedItem].handler()
end

function main()

while running do
 if selectedMenu == 1 then
  term.clear()
  term.setCursorPos(1,1)
  printMenu(mainMenu1)
  event, key = os.pullEvent("key")
  onKeyPressed(key,mainMenu1)
  elseif selectedMenu == 2 then
  term.clear()
  term.setCursorPos(1,1)
  printMenu(mainMenu2)
  event, key = os.pullEvent("key")
  onKeyPressed(key,mainMenu2)
  end
 end
end

main()