2. Select the floors you wish to colour using the buttons 0 to 9 on your phone. 0 is the topmost floor, and 9 the bottommost. Finish by pressing #. For example, if you want to colour the topmost four floors, you press 0123#. The colours on these floors are now controlled at the same time.

 

3. Colour the selected floors. Use the number buttons on your phone to mix red, green and blue until you get the colour you want.

The top row of numbers controls the colour red. You get less red by holding the number 1 pressed down, and more red by holding the number 3 pressed down.

The middle row of numbers controls the colour green. You get less green by holding the number 4 pressed down, and more green by holding the number 6 pressed down.

The bottom row of numbers controls the colour blue. You get less blue by holding the number 7 pressed down, and more blue by holding the number 9 pressed down.

When you have finished colouring, you can press the * to go back and select other floors, or end the call by pressing the #.