Abstract: This device projects slow moving light beams on the shadowed regions of a windowed room when the sun shines through the window. It includes a crystal-set (9) directly suspended from the bottom of a vertical rotor (14) of a motor (2) by a thread-like member (12). A small box (1), with attachment means to the window, supports the following interconnected electrical components: the motor (2) discussed above, a solar panel array (5), a capacitor (4), and a circuit (3). The capacitor is repeatedly charged slowly when the solar panel is exposed to sunlight, and discharged quickly by the circuit through the motor windings to occasionally pulse rotate the motor rotor about one turn. This occasional quick rotation activates and sustains the smooth and slow meandering rotation of the crystal-set about a vertical axis because of the loose thread-like member coupling between the motor rotor and crystal-set.