Cat's (1986)

A woman alone in a loft with frescoes of the '600 passes in less than two days a series of contradictory moods. Her only companions, underlining her status of exasperated solitude, are a video projector and an imaginary cat. Soon the protagonist is pushed outwards the loft, and in a chance meeting comes face to face with death.

Unfortunately the movie Cat's is not yet available on HBO Max.