Update README.md

README.md

@@ -3,9 +3,12 @@
 Creates a procedurally generated image that sort of looks like bubbles
 
 USAGE:
+    ```
     bubbles --width <WIDTH> --height <HEIGHT> --frames <FRAMES> --num-cells <NUM_CELLS> --out <OUT>
+    ```
 
 OPTIONS:
+```
     -f, --frames <FRAMES>          number of gif frames
     -h, --height <HEIGHT>          height of the image
         --help                     Print help information
@@ -13,3 +16,4 @@ OPTIONS:
     -o, --out <OUT>                output file
     -V, --version                  Print version information
     -w, --width <WIDTH>            width of the image
+```