Blender how to assign different color to different face

Step by step Blender how to assign different color to different face

1.  Press "TAB" to go into edit mode
2. Make sure on bottom you choose "FACE SELECT"
3. Right click on one of your face in your cube
4. On right hand panel click "Material", add a few new material, set the "diffuse " to red for material 1, blue for material 2, green for material 3 example
5. Now you can click material 2 to set your face to blue, while other face remain red


hope that help