local standby = 0
local tree = 0

while turtle.detectDown() do

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

        redstone.setOutput("left", true)

        while turtle.getitemCount(2) > 63 do
            print( "Depositing Items to Obby Pipe" )

            turtle.turnRight()
            turtle.drop(2)
            turtle.drop(3)
            turtle.turnLeft()
        end

    end

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

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

    end

end