function cavar()
  if turtle.detect() then
    turtle.dig()
    turtle.forward()
  end
  while turtle.detectDown() or turtle.detectUp()
    turtle.digUp()
    turtle.digDown()
  end
end

local run = 0

term.clear()
term.setCursorPos(1,1)
term.write("Quantos blocos? (3x3x3) :")
term.setCursorPos(1,3)
term.write("Blocos: ")

run = read()
rep = run

for i = 1, rep do
  for i = 1, run do
    cavar()
  end
  turtle.turnRight()
  run = run - 1

  for i = 1, run do
    cavar()
  end
  turtle.turnRight()

  for i = 1, run do
    cavar()
  end

  turtle.turnRight()
  run = run - 1

  for i = 1, run do
    cavar()
  end
  run = run +1
end

term.clear()
term.setCursorPos(1,1)
print("            -= Finished! =-")
print("       -Cubic mining by smezzy-")