Update README.md

Author: aeagle

README.md

@@ -28,6 +28,10 @@ These can be used with the top-level spaces ViewPort and Fixed and within other
 
 Spaces can be used by importing the spaces using the following:
 
+```typescript
+npm i react-spaces
+```
+
 ```typescript
 import * as Spaces from 'react-spaces';
 ```
@@ -36,6 +40,8 @@ import * as Spaces from 'react-spaces';
 
 Non-resizable spaces provide layout but can not be resized by user interaction.
 
+[Example on codesandbox.io](https://codesandbox.io/s/react-shapes-left-right-spaces-ml4kl?fontsize=14)
+
 ### Left and right spaces
 
 ```typescript
@@ -68,11 +74,11 @@ Resizable spaces allow the space to be resized by dragging with the mouse. The s
 
 ```typescript
 const App = () => (
-  <Space.Fixed height={400}>
+  <Space.ViewPort>
     <Space.LeftResizable size={200} />
     <Space.Fill />
     <Space.RightResizable size={200} />
-  </Space.Fixed>
+  </Space.ViewPort>
 )
 ```