Update BUILD.md

Fix typo/phrasing

BUILD.md

@@ -25,7 +25,7 @@ Instructions for other editors are welcome and feel free to contribute the docum
 
 
 ## Architecture
-Processing is build of three distinct parts, the `Core`, `Java` and the `App`. The `Core` currently stands alone and `Java` and `App` depend on it. `Java` and `App` are currently interdependent but we are working on decoupling those two.
+Processing is made of three distinct parts, the `Core`, `Java` and the `App`. The `Core` currently stands alone and `Java` and `App` depend on it. `Java` and `App` are currently interdependent but we are working on decoupling those two.
 
 `Core`: The part of the code that gets bundled with your sketches, so the functionality like `ellipse(25,25,50,50);` The inner workings of that function can be found here.
 
@@ -57,4 +57,4 @@ The main task to run or debug the PDE is `app:run` this run the application with
 
 If your main concern is with the `Core` you don't need to start the whole PDE to test your changes. In IntelliJ IDEA you can select any of the sketches in `core/examples/src/.../` to run by click on the green arrow next to their main functions. This will just compile core and the example sketch. Feel free to also new examples for your newly added functionality.
 
-## Other editors
+## Other editors