Here is the grid of dots, each dot has own size and color. On mouse over circles (dots) are grow and fill change color on click.
Made with pure JS and Canvas API. The source code size is 15 KB.

Features:
Night ≈25% – The dark background
Monochrome ≈15% – The monochrome dots on init, you still can color them by click Big ≈10% – Resolution is 5000x3000 Space Between – from 10 to 28px, it’s space between circles