var i;
        var distance = 280;
        var frames = 3 * 60;
        var speed = 5;
        var a = speed / frames;
        var maxDistance = speed * frames - ( a * frames * frames ) / 2;
        var speedTotal = 0;
        var coveredDistance = 0;

        log('maxDistance: ' + maxDistance);

        for (i = 0; i < frames; i++) {
            speed -= a;
            speedTotal += speed;
        }
        speed = 5;
        for (i = 0; i < frames; i++) {
            speed -= a;
            coveredDistance += speed / speedTotal * distance;
            log( Math.round( coveredDistance * 100 ) / 100 );
        }
        log('coveredDistance: ' + coveredDistance);
        log('---');