cleartype

turtle.select(1)
if turtle.getItemCount(1) == 0 then
  print("Please put item in slot1")
  return
end

step = true
while step do
  step = false

  if turtle.compareUp() then
    turtle.digUp()
    turtle.up()
    step = true
  elseif turtle.compareDown() then
    turtle.digdown()
    turtle.down()
  else
    for i=1,4,1 do

      if turtle.compare() then
        step=true
        turtle.dig()
        turtle.forward()
        break
      end
      turtle.turnLeft()
    end
  end
end