How is the tennis grand slam arranged after drawing lots and grouping? Say thank you in four and a half areas.

First, 32 seeds were selected according to certain rules (Wimbledon is complicated, and the other three Grand Slams are ranked in the world). Seeds 1 and No.2 were drawn in two half zones (upper and lower zones), namely 1|4 and 3|4, and then seeds No.3 and No.4 were drawn and randomly divided into two half zones, namely, 2|4 and 4|4. Similarly, seeds 5 to 8, 9 to 16 and 17 to 32 are also determined in this way.