TreeScript

local blockToMove = 99

-- I've made refill a function so you could use it anywhere in the code. But for now
-- this function will run at the start of each new loop to check if the turtle has
-- enough items
function refill()
    if turtle.getFuelLevel <= 50 then
        for i = 16,1,-1 do
            turtle.select(i)
            turtle.dropUp()
        end
        turtle.suckDown() --Code to pick up stacks of coal from chest
        turtle.refuel() --Code to refuel all
        turtle.turnRight()
        turtle.suck(1)
        turtle.turnRight()
        turtle.suck(2)
        turtle.turnLeft()
        turtle.turnLeft()
        print("Done Refueling")
    elseif turtle.getItemCount(1) == 0 then
        turtle.turnRight()
        turtle.suck(1)
        turtle.turnLeft()
        print("Refilled Saplings")
    elseif turtle.getItemCount(2) == 0 then
        turtle.turnRight()
        turtle.turnRight()
        turtle.suck(2)
        turtle.turnLeft()
        turtle.turnLeft()
        print("Refilled Bone Meal")
    end
end

-- Go home is now also a function, but this function should
-- actually never be called since removeTree has a "homing" system
function goHome()
    for attempt = 1, blocksToMove do
        local success, error = turtle.down()
        if not turtle.down() then
            turtle.back()
            print("Returned to Start")
            break
        end
    end
end

-- Remove tree is now also a function. It will
function removeTree()
    local up = 1
    local tree = true
    -- While turtle.inspectUP is true and turtle.inspectup.name = a log, dig up
    while turtle.inspectUp() and turtle.inspectUp().name == "MineFactoryReloaded:rubberwood.log" do
        turtle.digUp()
        turtle.up()
        up = up + 1
    end
    -- Go down as many times as we went up
    for i = 1, up do
        turtle.down()
    end
end

-- Make this one big loop so it keeeeeps on going
while true do
    -- First refill if needed
    refill()
    if turtle.detect() == false and turtle.detectUp() == false and turtle.detectDown() == false then
        -- This function should actually never run, since remove tree gets you home.
        -- Should go home
        goHome()
    else
        -- Check if there is anything in front of me
        local check, infront = turtle.inspect()

        if not check then
            -- No sapling and noving above me
            turtle.select(1)
            turtle.place()
            print("Placed Sapling")
        end
        -- Check if infront is a sapling. if so, place bonemeal. If it's a log, I should probably remove the tree
        if check and infront.name == "MineFactoryReloaded:rubberwood.sapling" then
            turtle.select(2)
            turtle.place()
            print("Used Bonemeal")
        elseif check and infront.name == "MineFactoryReloaded:rubberwood.log" then
            turtle.dig()
            turtle.forward()
            removeTree()
            turtle.back()
        end
    end
end