n = 15
while n > 0
  turtle.turnRight()
  if turtle.detect() then
    turtle.dig()
  end
  while turtle.compare() do
    turtle.dig()
  end
  turtle.forward()
  if turtle.detectUp() then
   turtle.digUp()
  end
  while turtle.compareUp() do
    turtle.digUp()
  end
  turtle.turnRight()

  a = 30
  while a > 0 do
    if turtle.detect() then
       turtle.dig()
    end
    while turtle.compare() do
       turtle.dig()
    end
    turtle.forward()
    if turtle.detectUp() then
       turtle.digUp()
    end
    while turtle.compareUp() do
        turtle.digUp()
    end
    a=a-1
  end

  turtle.turnLeft()
  if turtle.detect() then
    turtle.dig()
  end
  while turtle.compare() do
    turtle.dig()
  end
  turtle.forward()
  if turtle.detectUp() then
   turtle.digUp()
  end
  while turtle.compareUp() do
    turtle.digUp()
  end
  turtle.turnLeft()

 a = 30
  while a > 0 do
    if turtle.detect() then
       turtle.dig()
    end
    while turtle.compare() do
       turtle.dig()
    end
    turtle.forward()
    if turtle.detectUp() then
       turtle.digUp()
    end
    while turtle.compareUp() do
        turtle.digUp()
    end
  a=a-1
  end
  n=n-1
end