Fir Tree harvester

-- Quickie tree cutter
local cnt = 0
turtle.dig()
turtle.forward()
turtle.dig()
while turtle.detectUp() do
  turtle.digUp()
  turtle.up()
  if turtle.detect() then
    turtle.dig()
  end
  cnt = cnt + 1
end
turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.dig()
for i=1,cnt do
  turtle.digDown()
  turtle.down()
  turtle.dig()
end