Tree Farm

--tree farm propramm
FuelSlot = 16
SappSlot = 1
TurnRightBlock = {"chisel:sandstone_scribbles" ,10 }
TurnLeftBlock = {"chisel:sandstone" ,10 }
KeepStraightBlock = {"chisel:sandstone" ,8 }
RechargeBlock = {"chisel:sandstone" ,15 }

function checkBlock()
    t,Data = turtle.inspectDown()
    if t == false then
        os.shutdown()
    else
        if Data["name"] == TurnLeftBlock[1] and Data["metadata"] == TurnLeftBlock[2] then
            turtle.turnRight()
            checkWood()
            turtle.turnLeft()
            checkWood()
            turtle.turnLeft()
            turtle.forward()
        elseif Data["name"] == TurnRightBlock[1] and Data["metadata"] == TurnRightBlock[2] then
            turtle.turnLeft()
            checkWood()
            turtle.turnRight()
            checkWood()
            turtle.turnRight()
            turtle.forward()
        elseif Data["name"] == KeepStraightBlock[1] and Data["metadata"] == KeepStraightBlock[2] then
            turtle.turnLeft()
            checkWood()
            turtle.turnRight()
            turtle.turnRight()
            checkWood()
            turtle.turnLeft()
            turtle.forward()
        elseif  Data["name"] == RechargeBlock[1] and Data["metadata"] == RechargeBlock[2] then
            turtle.turnLeft()
            DumpStuff()
            turtle.turnRight()
            turtle.turnRight()
            FuelRequest()
            turtle.turnLeft()
            turtle.forward()
        end
    end
end

function checkWood()
    p,cData = turtle.inspect()
    if p == false then
        turtle.select(SappSlot)
        turtle.place()
    elseif cData["name"] == "minecraft:log" then
        turtle.dig()
        turtle.forward()
        a,b = turtle.inspectUp()
        local y=0
        while b["name"] == "minecraft:log" do
            turtle.digUp()
            turtle.up()
            a,b = turtle.inspectUp()
            y= y+1
        end
        for n = 1,y do
            turtle.down()
        end
        turtle.forward()
    end
end

function DumpStuff()
    for i=1,16 do
        if i ~= SappSlot or i ~= FuelSlot then
            turtle.select(i)
            turtle.drop()
        end
    end
end

function FuelRequest()
    c = turtle.getItemCount(FuelSlot)
    turtle.select(FuelSlot)
    turtle.suck(64-c)
end

function Refuel()
    if turtle.getFuelLevel() < 10 then
        turtle.select(FuelSlot)
        turtle.refuel(1)
    end
end

while true do
    checkBlock()
    Refuel()
end