Blender: How to use shapekey to animate blinking eye

Below is the tutorial I found on youtube

http://www.youtube.com/watch?v=gScAPFxTfv0


1. Select your object
2. On top right, under object data -> ShapeKey -> add shape key(basis)
3. then you click again add shape key 1
4. then you modify your mesh, such as close the eye
5. open 3 layer of screen, the second layer view as timeline, the third layer view as dopesheet
6. your mouse pointer pointing at the VALUE 0 under shape key 1 and press "I" to insert a keyframe
7. then just run the animation