ComputerCraft Pattern Lock

local monitor = peripheral.find("monitor")
monitor.setTextScale(.5)
monitor.setBackgroundColor(colors.white)
monitor.clear()
--local rsOut =

local pins = {}

for i = 1, 3 do
    for j = 1, 3 do
        table.insert(pins, window.create(monitor, i^2, j^2, 1, 1))
    end
end

for k, v in pairs(pins) do
    v.setBackgroundColor(colors.gray)
    v.clear()
end