Hi there, does anyone know how i could change this ENTER_FRAME below event so that the function doesnt occur on every frame.

stage.addEventListener(Event.ENTER_FRAME, snowflake);
function snowflake (event:Event):void


For example, it would do if it occured every 50 frames.

Or preferably, if it could occur randomly between every 50 - 100 frames


I'd appreciate any help at all,
Thanks a mil
B