spiral

function dig()
while turtle.detect() do
os.sleep(0.1)
turtle.dig()
if turtle.attack() then
turtle.dig()
end
end
fuelCheck()
chest()
turtle.forward()
turtle.digUp()
end

function digShaft(size)
for i=1,size do
dig()
end
end

function chest2()
turtle.dig()
turtle.forward()
turtle.digUp()
turtle.up()
turtle.select(2)
if turtle.getItemDetail().name ~= "minecraft:chest" or turtle.getItemDetail().name == nil then
 print("I've run out of chests!")
 rednet.broadcast(os.getComputerLabel() .. ": I'm out of chests!")
 while true do
  if turtle.getItemDetail().name == "minecraft:chest" then
   break
  end
  os.sleep(10)
 end
end
turtle.placeDown()
local slot = 3
for i = 1,14 do
    turtle.select(slot)
    turtle.dropDown()
    slot = slot + 1
end
slot = 3
turtle.select(3)
end


function fuelCheck()
    local f = turtle.getFuelLevel()
    if f < 50 then
        turtle.select(1)
        turtle.refuel(10)
        local rfl = turtle.refuel()
        if rfl == false then
            print("No fuel in slot 1!")
            rednet.broadcast(os.getComputerLabel .. ": I'm out of fuel!")
            print("Have you inserted more fuel?")
            local rfld = read()
            if string.find(rfld,'[yY]') == 1 then
             turtle.refuel()
            end
        end
    end
    turtle.select(3)
end

function chest()
local chk16 = turtle.getItemCount(16)
if chk16 ~= 0 then
    turtle.turnLeft()
    if not turtle.detect() then
        turtle.turnRight()
        turtle.turnRight()
        chest2()
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        turtle.down()
    end
    if turtle.detect() then
        chest2()
        turtle.turnRight()
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
        turtle.down()
    end
    turtle.select(1)
end
end

print("Please put fuel in slot 1, and chests in slot 2.")
print("Current fuel level is: ")print(turtle.getFuelLevel())


print("What is the size of the spiral quarry?")
local qSize = tonumber(read())

for k=1,3 do
digShaft(3*qSize)
turtle.turnLeft()
end

while qSize > 0 do

qSize = qSize -1
for i=1,2 do
digShaft(3*qSize)
turtle.turnLeft()
end
end
print("All done!")
rednet.broadcast(os.getComputerLabel() .. ": I'm finished the spiral mine!")