Looking at the painting below. Verbally respond to the work. What is it about?

Echo of a Scream by David Siqueiros.

Your response should be 1 paragraph in length.​

To create an illustration of perspective, this artist did all of the following except 1) show clear orthogonal lines 2) have an implied vanishing point 3) distort proportion to keep the background and foreground the same size 4) include value changes between the foreground and background i was thinking maybe 1