Filler

-- Mock turtle API
--[[
local turtle = {
    forward = function() end,
    turnRight = function() end,
    turnLeft = function() end,
    placeDown = function() end,
    getSelectedSlot = function()
        return 0
    end,
    getItemCount = function(_)
        return 0
    end,
}
local math = {
    fmod = function(_, _)
        return 0
    end,
}
local os = {
    sleep = function(_) end,
}
--]]

local function placeDown()
    while not turtle.placeDown() do
        for i = 1, 16 do
            if turtle.getItemCount(i) > 0 then
                turtle.select(i)
                break
            end
            if i == 16 then
        os.sleep(10)
      end
        end
    end
end

local x, y = ...
print("Filling a rectangle with sides " .. x .. " and " .. y)
for i = 1, y do
    turtle.forward()
    if math.fmod(i, 2) == 1 then
        turtle.turnRight()
    else
        turtle.turnLeft()
    end

    for _ = 1, x - 1 do
        placeDown()
        turtle.forward()
    end
    placeDown()

    if math.fmod(i, 2) == 1 then
        turtle.turnLeft()
    else
        turtle.turnRight()
    end
end