Could you give me some example, how does it look like?
Well, at its simplest, it is just a "for" loop with a delay.
for (int i = startAngle; i < endAngle; ++i) [
myServo.write (i);
delay (someDelayTime);
}
where someDelayTime is something like (totalTransitTime / (endAngle - startAngle)),
though this simple method doesn't always work well for multiple servos.