new README and examples

with caveats about blanks & square pictures

README.md

@@ -1,15 +1,29 @@
 # image-triangles
+
+Makes a [voroni diagram](https://en.wikipedia.org/wiki/Voronoi_diagram) and fills each cell with the average color the image below in. Please note, there's currently a bug, only square images will work. Additionally, some cells will be blank.
+
 ### examples
-![Sierra mountains original](examples/sierra.jpg)
-![Sierra mountains post-filter](examples/sierra-result.svg)
-![Dog original](examples/luna.jpeg)
-![Dog post-filter](examples/luna-result.svg)
+<!-- ![Sierra mountains original](examples/sierra.jpg) -->
+<!-- ![Sierra mountains post-filter](examples/sierra-result.svg) -->
+![Hawaii original](examples/birds-eye-view.png)
+![Hawaii post-filter](examples/birds-eye-view.svg)
+![Dog original](examples/luna-but-square.jpeg)
+![Dog post-filter](examples/luna-but-square.svg)
+
 
 ### to run:
 
+#### with nix
+
+```
+nix run  --experimental-features 'nix-command flakes' -- --cornerCount 800 --input examples/birds-eye-view.png --output output.svg
+```
+
+#### with cabal
 Install [cabal & ghc](https://www.haskell.org/ghcup/) if you don't have them.
 
 ```
 cabal update
-cabal run image-triangles -- --cornerCount 800 --input examples/sierra.jpg --output output.svg
+cabal run image-triangles -- --cornerCount 800 --input examples/birds-eye-view --output output.svg
 ```
+