first program farm lua

farming = false
pos = {0, 1, 0} -- x, y, z
front = true

function selectSeed()
    for i = 1, 16 do
        local data = turtle.getItemDetail(i)
        if data ~= nil then
            if data.name == "immersiveengineering:seed" then
                turtle.select(i)
                break
            end
        end
    end
end

function moveAndDig()
    if turtle.forward() == false then
        turtle.dig()
        turtle.forward()
        turtle.digDown()
        selectSeed()
        turtle.placeDown()
    end
end

function dropAll()
    for i = 1, 16 do
        local data = turtle.getItemDetail(i)
        if data ~= nil then
            turtle.select(i)
            if data.name == "immersiveengineering:seed" then
                turtle.turnLeft()
                if turtle.drop() == false then
                    print("No more space in the seed chest")
                    farming = false
                end
                turtle.turnRight()
            elseif data.name == "immersiveengineering:material" then
                turtle.turnRight()
                if turtle.drop() == false then
                    print("No more space in the result chest")
                    farming = false
                end
                turtle.turnLeft()
            else
                if turtle.dropUp() == false then
                    print("No more space in the miscellaneous chest")
                    farming = false
                end
            end
        end
    end
end

function needfuel()
    if turtle.getFuelLevel() < 100 then
        if pos[1] == 0 and pos[2] == 1 and pos[3] == 0 then
            if turtle.suckDown(16) == false then
                print("No more fuel in the fuel chest")
                farming = false
            elseif turtle.refuel() == false then
                print("Error while refueling")
                farming = false
            end
        end
    end
end

function farm()
    -- Drop all items
    dropAll()

    if farming == true then
        -- Look if fuel is needed
        needfuel()

        if farming == true then
            -- Just the first block
            moveAndDig()
            pos[3] = pos[3] + 1

            -- For all the farm 9 * 9 the first time
            for i = 1, 9 do
                for j = 1, 8 do
                    moveAndDig()
                    if front == true then
                        pos[3] = pos[3] + 1
                    else
                        pos[3] = pos[3] - 1
                    end
                end

                -- For the turn of the turtle
                if i < 9 then
                    if front == true then
                        turtle.turnRight()
                        moveAndDig()
                        turtle.turnRight()
                        pos[1] = pos[1] + 1
                        front = false
                    else
                        turtle.turnLeft()
                        moveAndDig()
                        turtle.turnLeft()
                        pos[1] = pos[1] + 1
                        front = true
                    end
                end
            end

            -- Going at the start
            turtle.turnLeft()
            for i = 1, 8 do
                moveAndDig()
                pos[1] = pos[1] - 1
            end

            turtle.turnLeft()
            for i = 1, 9 do
                moveAndDig()
                pos[3] = pos[3] - 1
            end

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

    sleep(60)
end

function main()
    farming = true
    while farming == true do
        farm()
    end
end

main()