Eye of Sauron

This uses a motorized 6 foot aluminium tube. The effect is dramatic on time lapse. Motor is a 24V aircraft motor with solid reduction gears and a cast alloy casing run from a 12 V SLA battery after I toasted a 9.6V NiCad.
"Eye of Sauron" Rotating long breakout point – Tesla Downunder

During the events of Tolkien's The Lord of the Rings, the Dark Lord Sauron - the primary antagonist - controlled his minions from within the tower of Barad-dûr in his land of Mordor. Thus he was never physically seen by the main characters. However, he did sometimes confront them from a distance, and in those cases he was often perceived as an "Eye".
Eye of Sauron – Wikipedia