how to make a table in readme.md files code example

Example 1: 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

Example 2: generate table of content in readme.md

$ wget https://raw.githubusercontent.com/ekalinin/github-markdown-toc/master/gh-md-toc
$ chmod a+x gh-md-toc