update example in README.rst

Author: caternuson

README.rst

@@ -64,11 +64,19 @@ Usage Example
     matrix.show()
 
     # Set a pixel in the origin 0,0 position.
-    matrix.pixel(0, 0, 1)
+    matrix.pixel[0, 0] = 1
     # Set a pixel in the middle 8, 4 position.
-    matrix.pixel(8, 4, 1)
+    matrix.pixel[8, 4] = 1
     # Set a pixel in the opposite 15, 7 position.
-    matrix.pixel(15, 7, 1)
+    matrix.pixel[15, 7] = 1
+    matrix.show()
+
+    # Change the brightness
+    matrix.brightness = 8
+
+    # Set the blink rate
+    matrix.blink_rate = 2
+
     matrix.show()
 
 Contributing
@@ -123,4 +131,4 @@ Now, once you have the virtual environment activated:
 
 This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
 view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
-locally verify it will pass.
+locally verify it will pass.