Sonic Screwdriver

os.loadAPI("ocs/apis/sensor")
senI = sensor.wrap("back")

while true do
zieleinv = senI.getTargets()
    for k,v in pairs(zieleinv) do
            if v.Name == "Player" then
             details = senI.getTargetDetails(k)
                    for i = 1,40 do
                    item = details.Inventory[i].Name
                    anzahl = details.Inventory[i].Size
                    maxanzahl = details.Inventory[i].MaxStack
                        if item == "empty" then
                        print("123")
                        end
                    end
end
end
sleep(3)
end