get true or false, throughtime in defined intervals 0.1.0 for Maya (maya script)

// get true or false, throughtime in defined intervals v0.1 Dec 24, 2009
//
// DESCRIPTION:
//          This is a simple Script returns a boolean value, 1 or -1 in this case, within each continuing 25 frames.
//          So that you can esily bind some stuff which need to alter continually within defined frames.
//         I wrote this script because I needed the gravity to change in each 25 frames, to create a waterlike effect for the cloth of a character.
//         when you define $oscilateframeinterval = 45 for example, the script will change its values in each 45 frames continually.
//
// INSTALLATION INSTRUCTIONS:
//        Simply go into the expression editor for the prameter that you want to bind.
//        for example you want to bind sphere translateX to 1 or -1, so
//        paste this code, and add the following line to the end :
//        sphere.translateX == $gravitydirection;
//        here i didnt change the name for the varible "$gravitydirection", in case it will be easier for you to understand the variable
//        keeping in mind the reason it was created for...

// ADDITIONAL INFORMATION:
//        This script may be freely distributed in its unmodified form!
//        This script may be nonse to some people as well as worthy to others, i am jsut trying to get better, and share the knowledge..
//
// AUTHOR:
//        Gokhan Ertem
//        LAMA Productions
//        gokhan@lamaproductions.com
//        https://www.lamaproductions.com
//
// COPYRIGHT: Gokhan Ertem