local standby = 0
local tree = 0
local drop = 0

while turtle.detectDown() do

	while redstone.getInput("back", true) do
		standby = 0
		tree = tree + 1
		drop = drop + 1

		print( "Chopping Tree Number "..tree )

		while turtle.detect() do
			turtle.dig()
			turtle.forward()
		end

		while turtle.detectUp() do
			turtle.digUp()
			turtle.up()
		end

		while not turtle.detectUp() and not turtle.detectDown() do
			turtle.down()
		end

		redstone.setOutput("left", false)

		turtle.back()
		turtle.select(1)
		turtle.place(1)

		redstone.setOutput("left", true)

		if drop == 5 then
			print( "Depositing Lumber to Obby Pipe" )

			turtle.turnRight()

			turtle.select(2)
			turtle.drop()
			turtle.select(3)
			turtle.drop()

			turtle.turnLeft()

			drop = 0
		end

	end

	while not redstone.getInput("back", true) do

		if standby == 0 then
			print( "Standby Mode" )
			standby = standby + 1
			tree = 0
		end

	end

end