radars

local radar = peripheral.wrap("top")
    local x,y = 1,1
    local monitor = peripheral.wrap("left")
    local timer = os.startTimer(1.5)
    local counter = 0
    print("Radarsystem online")
    while true do
          local event, param = os.pullEvent("key")
          if param == "timer" then
            monitor.clear()
            counter = table.getn(radar.getPlayerNames())
            if counter ~= 0 then
                  for i=0,counter,i+1 do
                    monitor.write(radar.getPlayerNames()[i]) --is doing nothing :/
                    x,y = monitor.getCursorPos()
                    y = y + 1
                    monitor.setcursorPos(1,y)
                  end
            end
            timer = os.startTimer(1.5)
          elseif param == 16 then
            print("closing program...")
            error("Radar System Closed")
          end
    end