I experienced this as a kid, mostly when sick. Feels like the cubes part of the "metachaos" video: https://www.youtube.com/watch?v=2UPUhn9hpTU
I experienced this as a kid, mostly when sick. Feels like the cubes part of the "metachaos" video: https://www.youtube.com/watch?v=2UPUhn9hpTU