Chasey489
The wiki says it all!

Go here https://powdertoy.co.uk/Wiki.html

Chasey489
Please refrain from making all capital and generic titles

Chasey489
Download the source, double click powder.h, follow the wiki.
Although the wiki for powder.c isn't very useful...

Go to the top of this page, click "download" scroll down to "wrong operating system? Click here!" click the source.