1
00:00:00,000 --> 00:00:04,000
Shade one of two equal parts.

2
00:00:04,000 --> 00:00:08,000
Split each half: two of four parts.

3
00:00:08,000 --> 00:00:12,000
Split again: four of eight parts.

4
00:00:12,000 --> 00:00:16,000
The parts change. The amount stays the same.