Tree Script

local slots ={}

function plantTree()
    turtle.select(1)
    turtle.place()
end

function chopTree()
    turtle.select(4)
    turtle.dig()
    turtle.forward()
    while turtle.detectUp() do
        turtle.digUp()
        turtle.up()
    end
    while not turtle.detectDown() do
        turtle.down()
    end
    turtle.back()
end

function hasTreeGrown()
    turtle.select(3)
    return turtle.compare()
end

function bonemealTree()

    turtle.select(2)
    turtle.place()
end

function dropOffResources()
    for i=4, 16, 1 do
        turtle.select( i )
        turtle.dropDown( 64 )
    end
end

function checkSlot( slot )
    if turtle.getItemCount(2) == 0 then
        if slots[ slot ] == true then
            print( "Slot " + slot + " empty" )
            slots[ slot ] = false
        end
    else
        slots[ slot ] = true
    end
end

while true do
    if hasTreeGrown() then
        chopTree()
        dropOffResources()
    else
        plantTree()
        bonemealTree()
    end
    sleep(1)
    checkSlot( 1 )
    checkSlot( 2 )
    checkSlot( 3 )
end