draws a triangle, plays some sine waves
if you already have cosmocc and usual linux tools on PATH, you can maybe skip this
cosmo-env/build.sh # or .ps1
cosmo-env/activate.sh # or .ps1
make o/triangle-sine.com
with system SDL2
o/triangle-sine.com
with included SDL2 (windows-only, for now)
SDL2_DYNAMIC_API=/zip/SDL2.dll o/triangle-sine.com