grassStacker.lua

print("x:")
local x = read()
print("y:")
local y = read()

local ix = 0
local iy = 0
local ii = 0

local i = true
while i do
    print("Please, enter the direction where the turtle will go ( r / l )")
    local direction = read()
    if direction == "r" then
        ii = 0
        print("Accepted! Direction is Right")
        i = false
    elseif direction == "l" then
        ii = 1
        print("Accepted! Direction is Left")
        i = false
    else
        print("Incorrect value")
    end
end

local count = 0
local slot = 1
local block, data = turtle.inspectDown()
print(block, data.name)

for ix = 0, x - 1 do
    block, data = turtle.inspectDown()

    if count == 63 then
        slot = slot + 1
        count = 0
    end

    if slot <= 16 then
        turtle.select(slot)
    else
        print("Out blocks!!!")
        os.pullEventRaw()
    end

    if block == true then
        if (data.name ~= "minecraft:grass_block") and (data.name ~= "minecraft:dirt") then
            turtle.dig()
            turtle.digDown()
            turtle.placeDown()
            count = count + 1
            turtle.forward()
        else
            turtle.dig()
            turtle.forward()
        end
    else
        turtle.dig()
        turtle.digDown()
        turtle.placeDown()
        count = count + 1
        turtle.forward()
    end
end
for iy = 0, y - 1 do
    turtle.refuel()
    turtle.getFuelLevel()
    if ii % 2 == 0 then
        turtle.turnRight()
        turtle.dig()
        turtle.digDown()
        turtle.placeDown()
        count = count + 1
        turtle.forward()
        turtle.turnRight()
    else
        turtle.turnLeft()
        turtle.dig()
        turtle.digDown()
        turtle.placeDown()
        count = count + 1
        turtle.forward()
        turtle.turnLeft()
    end
    ii = ii + 1
    for ix = 0, x - 1 do
        block, data = turtle.inspectDown()

        if count == 63 then
            slot = slot + 1
           count = 0
        end

        if slot <= 16 then
            turtle.select(slot)
        else
            print("Out blocks!!!")
            os.pullEventRaw()
        end

        if block == true then
            if (data.name ~= "minecraft:grass_block") and (data.name ~= "minecraft:dirt") then
                turtle.dig()
                turtle.digDown()
                turtle.placeDown()
                count = count + 1
                turtle.forward()
            else
                turtle.dig()
                turtle.forward()
            end
        else
            turtle.dig()
            turtle.digDown()
            turtle.placeDown()
            count = count + 1
            turtle.forward()
        end
    end
    ix = 0
end
turtle.digDown()
turtle.placeDown()