how to make table of contents in readme.md code example

Example 1: readme.md table formatting

|   |   |   |   |   |
|---|---|---|---|---|
|   |   |   |   |   |
|   |   |   |   |   |
|   |   |   |   |   |

Example 2: how to draw table in readme file

Attempt | #1 | #2 | #3 | #4 | #5 | #6 | #7 | #8 | #9 | #10 | #11
--- | --- | --- | --- |--- |--- |--- |--- |--- |--- |--- |---
Seconds | 301 | 283 | 290 | 286 | 289 | 285 | 287 | 287 | 272 | 276 | 269