Long description

Two iterations labeled, Iteration 0 and Iteration 2. Iteration 0: Seven blocks labeled StartFraction 1 over 7 EndFraction, are shown here. Four StartFraction 1 over 7 EndFraction blocks are arranged at the bottom. Each of the adjacent blocks are connected to each other by double sided arrows. The first and fourth blocks are connected to each other by a double sided arrow. The fifth and sixth StartFraction 1 over 7 EndFraction blocks are arranged above this, and the last block is placed above this. Arrows from the first, second, third and fourth blocks points to the fifth and sixth blocks. An arrow from the fifth and sixth blocks points to the last block. Iteration 2: The first four blocks arranged on the bottom row is labeled StartFraction 1 over 28 EndFraction. Each of the adjacent blocks are connected to each other by double sided arrows. The fifth and sixth blocks labeled StartFraction 1 over 14 EndFraction, are arranged on the middle row, and the last block labeled StartFraction 2 over 7 EndFraction is on the first row. Arrows from the first four blocks points to the fifth and sixth blocks. Arrows from the fifth and sixth blocks points to the last block. An arrow from iteration 0 points to iteration 2.