What to see
Below you see a rotating array of blue crosses and 3 yellow dots. Now fixate on the centre (watch the flashing green spot). Note that the yellow spots disappear once in a while: singly, in pairs or all three simultaneously. In reality, the 3 yellow spots are continuously present, honest !
What to do
You can use the slower/faster buttons to change speed. Disappearance persists down to surprisingly low speeds. [ If there are no buttons on the right, please update your Flash player.]
You can use the larger/smaller buttons to change size. Disappearance persists up to surprisingly large sizes.
You can use the “back-col” button to change the background colour. The yellow dots disappear into whatever colour the background has.
The ‘defaults’ button at the top restores the standard settings.
Sent by Bob...Thanks !
