TheDavid8 That's expected. Did you know that these can also cause seizures? In Broadcast… there are some strict guidelines.
Some countries, including the UK, Japan, Russia, and Italy,10 have implemented regulations to limit risks of broadcast material for provoking seizures. Guidelines that are employed in Britain and Japan include limits not only on light flash and colors, but on patterns. Striped patterns are restricted if they last more than 0.5 seconds, occupy at least 25% of the screen at typical viewing distances, and have luminance above 50 candela per meter squared.2
https://onlinelibrary.wiley.com/doi/full/10.1111/epi.17175