Mine

local times = 0
local j = 0

function Mine()
  while turtle.detect() == true do
    turtle.dig()
    sleep(0.50)
  end
  turtle.forward()
  sleep(0.50)
  while turtle.detectUp() == true do
    turtle.digUp()
    sleep(0.50)
  end
  turtle.digDown()
end

function Place(SlotNum)
  turtle.select(SlotNum)
  turtle.back()
  turtle.placeUp()
  turtle.forward()
end

write("How many Digs ?")
times = read()

for i=1, times do
  j = j+1
  Mine()
  if j == 7 then
    Place(16)
    j = 0
  end
end