Long description

The figure shows four blocks containing two columns arranged sequentially from left to right are given as follows. First block: 3, blank. Second block: 4, blank. Third block: 6, blank. Fourth block: 2, blank. Fifth block: 1, X. A clock header is given to the first block. A block labeled current time which contains 4200 and another block labeled next signal containing 3 is placed at the top.