Hologram Cage

You weave light into a cube of vivid and fantastic patterns. The walls shed bright light for 10 feet (and dim light for the next 20 feet) and completely block line of sight; creatures within the cage can't be seen by creatures outside of it, though they can see each other, and creatures outside of it can't see into it. You can Dismiss the spell, and if you Cast the Spell again, your previous hologram cage ends.