Computercraft - dig

-- dig

function forward()
  while turtle.detect() do
    turtle.dig()
    os.sleep(0.5)
  end
  while not turtle.forward() do turtle.dig() end
end

function back()
  if not turtle.back() then
    turtle.turnLeft()
    turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.turnRight()
  end
end

function leftWithoutMoving()
  turtle.turnLeft()
  while turtle.detect() do
    turtle.dig()
    os.sleep(0.5)
  end
  turtle.turnRight()
end

function rightWithoutMoving()
  turtle.turnRight()
  while turtle.detect() do
    turtle.dig()
    os.sleep(0.5)
  end
  turtle.turnLeft()
end

function up()
  while turtle.detectUp() do
    turtle.digUp()
    os.sleep(0.5)
  end
  while not turtle.up() do turtle.digUp() end
end

function down()
  while turtle.detectDown() do
    turtle.digDown()
  end
  while not turtle.down() do turtle.digDown() end
end