New Arts, Eighth and Ninth, the arts born in the 20th century

In 1985 the Lumière brothers screened the first film and gave birth to the seventh art. At that time the world was lit by candles and the carriages were drawn by horses. The 20th century came with all its technological and cultural developments and two new arts emerged: the eighth, and the ninth. This brief manifesto explains what these arts are, their limits, themes, and development, in an easy and brief way and with lots of examples.