local r = require("turtle")

function go()
  while not r.forward() do
    r.din()
  end
end

function godown()
  while not r.down() do
    r.digDown()
  end
end

function goup()
  while not r.up do
    r.digUp()
  end
end


for i = 1, 80 do
  r.digDown()
  r.digUp()
  go()
end