turtle

print("Creating plot")

local dir = 1

local curl = 1

local curt = 15

local dirt = 0

turtle.select(curl)

turtle.digDown()
turtle.down()

for i = 1, 4 do
    if i > 1 then
        turtle.turnLeft()
    end
    for i = 1, 21 do
        if turtle.getItemCount(curl) == 0 then
            curl = curl + 1
        end
        if turtle.detect() then
            turtle.dig()
        end
        if not turtle.detectDown() then
            turtle.placeDown()
        end
        turtle.forward()
    end
end

turtle.turnLeft()
turtle.up()

turtle.select(curt)

for i = 1, 4 do
    if i > 1 then
        turtle.turnLeft()
    end
    for t = 1, 21 do
        if turtle.getItemCount(curt) == 0 then
            turtle.select(curt + 1)
        end
        if not turtle.detectDown() or not turtle.compareDown() then
            turtle.digDown()
            turtle.placeDown()
        end
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
    end
end

turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
turtle.forward()
turtle.turnRight()
turtle.down()
turtle.select(curl)

for i = 1, 19 do
    for t = 1, 19 do
        if turtle.compareDown(1) == false then
            turtle.digDown()
        end
        if turtle.detectDown() == false then
            if turtle.getItemCount(curl) == 0 then
                curl = curl + 1
                turtle.select(curl)
            end
            turtle.placeDown()
        end
        if turtle.detect() then
            turtle.dig()
        end
        turtle.forward()
    end
    if dir == 1 then
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        turtle.turnLeft()
        dir = 2
    elseif dir == 2 then
        turtle.turnRight()
        turtle.dig()
        turtle.forward()
        turtle.turnRight()
        dir = 1
    end
end