local tree = 0

while turtle.detectDown or not turtle.detectDown do

    while not turtle.detect() do
        turtle.forward()

        while redstone.getInput("left", true) do
            tree = tree + 1

            print( "Tree Detected Starting Logging Sequence" )
            print( "This is tree number: "..tree )

            turtle.turnRight()
            turtle.forward()

            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

            turtle.back()
            print( "Logging Sequence Complete" )

            print( "Replanting Sapling" )
            turtle.select(1)
            turtle.place(1)

            turtle.back()
            turtle.turnLeft()
        end

        while redstone.getInput("right", true) do
            tree = tree + 1

            print( "Tree Detected Starting Logging Sequence" )
            print( "This is tree number: "..tree )

            turtle.turnLeft()
            turtle.forward()

            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

            turtle.back()
            print( "Logging Sequence Complete" )

            print( "Replanting Sapling" )
            turtle.select(1)
            turtle.place(1)

            turtle.back()
            turtle.turnRight()
        end
    end

    while turtle.detect() and not turtle.detectDown() do

        if turtle.getItemSpace(2) == 0 then

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

            turtle.up()

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

            turtle.forward()
            turtle.forward()

            turtle.select(2)
            turtle.drop()

            if turtle.getItemSpace(3) < 64 then
                turtle.select(3)
                turtle.drop()
            end

            turtle.back()
            turtle.back()
            turtle.down()
        end

        turtle.turnRight()
        turtle.turnRight()
    end

    while turtle.detect() do
        turtle.turnRight()
        turtle.turnRight()
    end
end