CSS Diamond & Hex Grid

Diamond grid

From Kevin Powell's Create a diamond grid with CSS (with a bonus animation) video.

guitar player at concert duo singing crowd cheering singer performing singer fistbumping crowd man with a guitar singing crowd looking at a lighted stage woman singing on stage

Hex grid

Slightly more complex due to the dimensions of a regular hexagon...

guitar player at concert duo singing crowd cheering singer performing singer fistbumping crowd man with a guitar singing crowd looking at a lighted stage