Mining Turtle strip mining (chest + no refuel))

--Place the turtle in front of the blocks you want it to start to strip mine.
--Place chests in slot 16 and give it some coal to start.
--It will mine 80 blocks forward, turn to the right, leave a 2 Block gap, and mine 80 blocks back.

--When it is done mining it will dif a 2 wide Hallway, place a chest, dump all its contents and move to a new starting position.
--If there is enough fuel and more chests the turtle will repeat indefinitely.


term.clear()
term.setCursorPos(1,1)

print("Turtle is now powered on.")

FL = turtle.getFuelLevel()
turtle.select(16)
sloot = turtle.getItemDetail()
Chest = turtle.getItemCount()


l=0

while l < 1 do

if FL > 500 and Chest > 0 and sloot.name == "minecraft:chest" then

function dig()
    turtle.digUp()
    turtle.digDown()
    turtle.dig()
    sleep(1)
    block = turtle.detect()
    while turtle.detect() == true do
        turtle.dig()
        sleep(1)
        block = turtle.detect()
    end
    turtle.forward()

end


i = 0
while i < 80 do
    dig()
    i = i + 1
end

turtle.turnRight()

i = 0
while i <3 do
    dig()
    i = i + 1
end

turtle.turnRight()

i = 0
while i < 80 do
    dig()
    i = i + 1
end

turtle.digUp()
turtle.digDown()
turtle.turnRight()

i = 0
while i <2 do
    dig()
    i = i + 1
end

turtle.turnLeft()
turtle.dig()
turtle.digUp()
turtle.digDown()
turtle.forward()
turtle.digUp()
turtle.digDown()

turtle.turnLeft()

i = 0
while i <5 do
    dig()
    i = i + 1
end

turtle.turnLeft()
turtle.dig()
turtle.digUp()
turtle.digDown()
turtle.forward()
turtle.digUp()
turtle.digDown()
turtle.turnLeft()

i = 0
while i <2 do
    dig()
    i = i + 1
end

turtle.turnLeft()
turtle.turnLeft()
turtle.dig()
turtle.digUp()
turtle.digDown()
turtle.forward()
turtle.dig()
turtle.forward()

turtle.turnLeft()
turtle.dig()
turtle.digUp()
turtle.digDown()
turtle.forward()
turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.digUp()

turtle.turnLeft()
turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.turnLeft()
turtle.select(16)
turtle.place()

i = 1
while i < 16 do
    turtle.select(i)
    turtle.drop(64)
    i = i + 1
end

turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.turnLeft()
FL = turtle.getFuelLevel()
turtle.select(16)
Chest = turtle.getItemCount()
sloot = turtle.getItemDetail()

if sloot == nil then
    l=1
end


else

l=1
end
end

if FL < 500 then
    print("Turtle has run out of fuel, shutting down.")
end

if Chest == 0 then
    print(" Turtle has run out of chests, shutting down.")
end

print("Programm stopped.")