CD a fast flashing source may cause some epileptic fit only in case of a linear flash( I mean with allways the same time interval between the flash ) and with a range of 20Hz to 80 Hz In the case of my logo, it's set on a non-linear time set and not over 5Hz, so there is no danger of epileptic cunfulsion looking at it. Anyway thank you for the advice! It's true that it may be important to notice that in some cases.