print("Rows of trees?")
local TreeRows = io.read()
print("Cols of trees?")
local TreeCols = io.read()

local DIRT = 1
local SAPLING = 2
local LOG = 3

-- plant trees
turtle.select(SAPLING)
for y = 1, TreeRows do
    for x = 1, TreeCols do
        turtle.forward()
        turtle.turnRight()
        turtle.place()
        turtle.turnLeft()
        turtle.forward()
        turtle.forward()
    end

    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.turnLeft()

    for x = 1, TreeCols do
        turtle.back()
        turtle.back()
        turtle.back()
    end
end

turtle.turnLeft()
for y = 1, TreeRows do
    turtle.forward()
    turtle.forward()
    turtle.forward()
end

turtle.turnRight()
turtle.select(LOG)

while true do
    for y = 1, TreeRows do
        for x = 1, TreeCols do
            turtle.forward()
            turtle.turnRight()

            if turtle.compare() then
                turtle.dig()
                turtle.forward()

                while turtle.detectUp() do
                    turtle.digUp()
                    turtle.up()
                end

                while not turtle.detectDown() do
                    turtle.down()
                end

                turtle.back()
            end

            turtle.turnLeft()
            turtle.forward()
            turtle.forward()
        end

        turtle.turnRight()
        turtle.forward()
        turtle.forward()
        turtle.forward()
        turtle.turnLeft()

        for x = 0, TreeCols do
            turtle.back()
            turtle.back()
            turtle.back()
        end
    end

    turtle.turnLeft()
    for y = 1, TreeRows do
        turtle.forward()
        turtle.forward()
        turtle.forward()
    end

    turtle.turnRight()
end