TonyTreeFarm

turtle.select(2) --select slot #2: oak wood
while true do

    if turtle.compare() then
        turtle.dig() --current height:1
        if turtle.getFuelLevel() < 8 then --if fuel level is low
            turtle.select(1) --select slot #1: coal
            turtle.refuel(1) --refuel 1 coal
            turtle.select(2) --reselect slot #2 for next loop
        end
        turtle.forward()
        turtle.digUp()
        turtle.up() --current height:2
        turtle.digUp()
        turtle.up() --current height:3
        turtle.digUp()
        turtle.down() --current height:2
        turtle.down() --current height:1
        turtle.back()
    end
    sleep(60)
end