floorFromWall

function Topup()
    function Fuel()
        while turtle.getFuelLevel() < 5000 do
            turtle.select(16)
            while turtle.placeUp() == false do
                turtle.digUp()
                turtle.attackUp()
            end
            turtle.select(15)
            turtle.suck(64)
            turtle.refuel(64)
            turtle.select(16)
        end
    end
    --Fuel()
    while turtle.getFuelLevel() < 100 do
        print("GIMME FUEL")
        turtle.select(15)
        turtle.refuel(64)
        sleep(1)
    end
    turtle.select(1)
    while turtle.getItemCount() <= 1 do
        turtle.select(16)
        while turtle.placeUp() == false do
            turtle.digUp()
            turtle.attackUp()
        end
        turtle.select(1)
        turtle.suckUp(63)
        turtle.select(16)
        turtle.digUp()
        turtle.select(1)
    end
end

local sslt = 0
while true do
    Topup()
    turtle.place()
    if turtle.back() == false then
        turtle.turnLeft()
        if sslt == 0 then
            turtle.up()
            turtle.placeDown()
            break
        end
        sslt = 0
    else
        sslt = sslt + 1
    end
end