treeFarm

function main()
  turtle.select(1)
if turtle.compare() then
  turtle.dig()
  turtle.forward()
  while turtle.detectUp() do
    turtle.digUp()
    turtle.up()
  end
  while turtle.down() do
    turtle.down()
  end
  turtle.back()
  turtle.select(2)
  turtle.place()

  turtle.turnLeft()
  turtle.turnLeft()

  turtle.select(1)
  a = turtle.getItemCount(1) - 1
  if a == -1 then
    a = 0
  end
  if a == 0 then
    a = 0
  end
  turtle.drop(a)

  turtle.select(2)
  b = turtle.getItemCount(2) - 1
  if b == -1 then
    b = 0
  end
  if b == 0 then
    b = 0
  end
  turtle.drop(b)

  turtle.select(3)
  turtle.drop()

  turtle.turnLeft()
  turtle.turnLeft()

end
sleep(120)
turtle.suckUp()
main()
end

main()