Strip Mine

print("How long to mine?")
farest = tonumber(read())
print("If i stop at HOME make sure i have fule in the first sloot")
digLenth = 0

function GoHome()
    turtle.turnLeft()
    turtle.turnLeft()
    while (digLenth) do
        turtle.forward()
    end
end

function Emty()
    for i = 2, 16, 1 do
        turtle.drop(turtle.getItemCount())
    end
end

for i = 1, farest, 1 do
    fullSlots = 0
    for j = 1, 16, 1 do
        turtle.select(j)
        if (turtle.getItemCount() >= 64) then
            fullSlots = fullSlots + 1
        end
    end
    if(fullSlots >= 15) then
        GoHome()
        Emty()
    end

    if (turtle.getFuelLevel() == 0) then
        for j = 1, 16, 1 do
            turtle.select(j)
            turtle.refuel()
            if (turtle.getFuelLevel() == 0) then
                break
            end
        end
    end

    turtle.dig()
    turtle.forward()
    turtle.digUp()
    digLenth = digLenth + 1
end
print("return home?")
if (read() == "Yes") then
    GoHome()
end