STUPID F LASH TRICKS===>>>
Just because we can do it, however, doesn't mean that we should--and here you'll find a list of ten Stupid Flash Tricks that you can create in Flash, but that you may want to avoid unless you enjoy driving your viewers away.
1. Blinking Text
The first time you learn how to make text blink, you may point and giggle and think "That's cool, look what I did!" By the tenth time that your viewers have seen blinking text overused in one website or another, however, their first instinct will be to close the site without even reading the obnoxiously flashing, eye-searing text. You may think that making your text blink draws focus to your content--but all that it draws focus to is how annoying blinking text is. Avoid this unless you want your website or animation to look like it was culled from Crazy Al's Overstock Mattress Warehouse.
2. Rainbow Gradients
To this day I wonder why Macromedia even bothered including a preset rainbow gradient, especially such a bright one. If you're really determined to use every shade in the ROYGBIV spectrum, find a way to incorporate them tastefully; don't just slap a rainbow gradient on something and think it looks cool. There are places for rainbows, sure--like in an actual rainbow. But if you're just using one because you can it and it has no real use in your scene or in your design elements, try something a bit more subtle, and a bit less blinding.
3. Cycling Background Colors
In my opinion, there is no better way to ensure that 90% of viewers will close your site/Flash movie within the first five seconds. Pick a background color. Stick with it. Cycling through background colors, whether they shift sharply or fade from one to the other, is a good way to either a.) give your readers a seizure, or b.) make it impossible for them to focus on the text or objects laid over that background.