startup.lua

me = peripheral.wrap("back")
mon = peripheral.wrap("top")
local mxcw = 20



bottle = {}
bottle["clear"] = {}
bottle["clear"].amout = 0
bottle["clear"].name = "toughasnails:purified_water_bottle"

bottle["empty"] = {}
bottle["empty"].amout = 0
bottle["empty"].name = "minecraft:glass_bottle"

bottle["water"] = {}
bottle["water"].amout = 0
bottle["water"].name = "minecraft:potion"

while true do
    items = me.listItems()
    for i, item in ipairs(items) do
        if string.match(item.name, bottle["clear"].name) then
            bottle["clear"].amout = item.amount
        end
        if string.match(item.name, bottle["water"].name) then
            bottle["water"].amout = item.amount
        end
        if string.match(item.name, bottle["empty"].name) then
            bottle["empty"].amout = item.amount
        end
    end

    print("Water: " .. bottle["water"].amout)
    print("Clear: " .. bottle["clear"].amout)
    print("Emtpy: " .. bottle["empty"].amout)

    if bottle["clear"].amout < mxcw then
        local cwnd = mxcw - bottle["clear"].amout
        if bottle["water"].amout > 0 then
            x = me.export(bottle["water"].name ,0 ,cwnd ,"south")
            print(x .. " water bottle exported from ME for clear")
        elseif bottle["empty"].amout > 0 then
            x = me.export(bottle["empty"].name,0,cwnd,"north")
            print(x .."empty bottle exported from ME for refill and clear")
        end
    end
    sleep(1)
end