Argentina has a blue and white flag. The flag's colours symbolise the sky, the waters of the Rio de la Plata, and peace ...

This will then disappear and you may see the traditional red, white, and blue flag ... may see the right colours of the flag. One social media user wrote on X: "Brilliant. It definitely works ...

All you have to do is stare at the middle of the green, yellow, and black version of the Union Jack flag ... and blue cones that get fatigued and fail to respond properly when the white screen ...