local dist = 0

turtle.select(2)

function digLayer()
if turtle.getItemCount(2)<3 then
turtle.select(3)
turtle.transferTo(2)
turtle.select(2)
end
turtle.turnLeft()
turtle.dig()
turtle.place()
turtle.turnRight()
turtle.turnRight()
turtle.dig()
turtle.place()
turtle.turnLeft()
turtle.digUp()
upity()
turtle.placeDown()
dist = dist + 1
end

function digEmpty()
turtle.turnLeft()
turtle.dig()
turtle.turnRight()
turtle.turnRight()
turtle.dig()
turtle.turnLeft()
turtle.digUp()
turtle.up()
upity()
dist = dist + 1
end

function upity()
if detectUp() then
turtle.digUp()
upity()
else
turtle.up()
end

function filler()
if turtle.getFuelLevel()<10 then
turtle.select(1)
turtle.refuel(1)
turtle.select(2)
end
end

for i = 1,55,1 do
filler()
if dist==5 then
digLayer()
dist=0
end
if dist == 0 then
digLayer()
end
digEmpty()
end

run()