How can I increase the number of blog post columns to 5 instead of 3?

[Ammzish]

Thank you for the reply, I pasted the code you provided and it did nothing. and I want to let you know that the code I mentioned above I removed it from the theme.liquid and I replace back the code to (.grid–uniform .medium-up–one-third:nth-of-type(3n+1)) do I still need to replace it to 5n+1?