local mn = peripheral.wrap("front")
local side = "drive_7"
mn.setBackgroundColor(colors.white)
mn.clear()
mn.setCursorPos(1,1)
mn.write("BctaBte")
mn.setCursorPos(1,2)
mn.write("kartu")
-- funcs
local function clear()
  mn.clear()
end
local function setTextColor(clr)
  mn.setTextColor(clr)
end
local function setCursorPos(x,y)
  mn.setCursorPos(x,y)
end
local function setBackgroundColor(clr)
  mn.setBackgroundColor(clr)
end
local function write(txt)
  mn.write(txt)
end
function drawBT(colorm, txt, line)
NsetBackgroundColor(colorm)
NsetCursorPos(1,line)
for i=1,7 do
    NsetBackgroundColor(colorm)
    for g=1,2 do
        Nwrite(" ")
    end
    NsetCursorPos(1+i,line)
end
NsetCursorPos(1,line)
Nwrite(txt)
end
-- loop
while true do
  local event, side = os.pullEvent()
  local cardfile = fs.open("/disk/card","r")
  if (cardfile) then
    clear()
    drawBT(colors.green,"Enter PIN",1)
    drawBT(colors.red,"EJECT",4)
  else
    clear()
    setCursorPos(1,2)
    setTextColor(colors.red)
    setBackgroundColor(colors.white)
    write("Eto ne karta!")
    disk.eject(side)
  end
end