The ObjectFiller contains also tons of sequence generators, like the SequenceGeneratorInt32 or the SequenceGeneratorDateTime. When used without any particular setup, they will simply create an increasing sequence like [1,2,3,...]. Most of these sequence generators can be customized to use a different start value (From), a different increment (Step) or can even wrap around after hitting an end value (To). The Step property can be even set to a negative value to generate a decreasing sequence, like in the example below.
public void Countdown()
{
var generator = new SequenceGeneratorInt32
{ From = 3, Step = -3 };
generator.GetValue(); // returns 3
generator.GetValue(); // returns 0
generator.GetValue(); // returns -3
generator.GetValue(); // returns -6
}