So these are a few things I have had on my computer for ages. I just want to use them so I can get rid of them finally. You may find them interesting, you may not. Whatever.
Count the black dots...
You may have to click to enlarge to see better. This is what stopped me from correcting my spelling mistakes while chatting on instant messangers.
I don't know what would happen if my dad tried this. He is color blind. Did you know that only men can be color blind? Weird hey?