The Planets app is a digital display of Holst's Planets symphony.

It plays with Holst's symphony and its abstracts shapes enhances the experience.

The title refers to the astrological planets and we should remember that when Holst was writing the Planets in 1913 onwards the images we have today of the planets would not have been the images available in that period. The movements are as follows:-

1. Mars, the Bringer of War. Mars, was the first of the movements to be completed. It is named after the Roman God Mars, the God of war. The visual display is in red and black and moving darker as the movement progresses. This is in keeping with Holst pounding rhythms.

2. Venus, The Bringer of Peace. Venus, named after the Roman Goddess of love is a movement of peace and tranquility. The display has dominant colours of white and yellow and shapes that move at a leisurely pace.

3. Mercury, the Winged Messenger. Mercury, again a Roman God, was the god of messengers and the movement is light and the visual display with a dominant colour of deep yellow follows suit.

4. Jupiter, the Bringer of Jollity. Jupiter was the king of the Roman Gods. The movement is impressive and majestic and the visual display puts it at the centre of the other six planets, all of which turn on Jupiter's axis.

5. Saturn, the Bringer of Old Age. This was Holst favourite movement and its slow and ponderous tempo evokes old age. The visuals mirror this with two rings that evoke the passing of time and the dominant colour being grey. As the movement progresses the colours fade becoming more opaque.

6. Uranus, the Magician. The tempo of the movement moves around reflecting a magician who deeds can be bad as well as good. The visuals reflect this with circles moving around creating new shapes while others disappear.

7. Neptune, the Mystic. A very quiet and peaceful movement renowned for having a choir that slowly fades. The visuals replicate the music in having slow movement and halo effect circles opening and closing under the main groups of circles.

The handbook Holst The Planets by Richard Greene has been invaluable in understanding the musical work, The Planets.