Likewise, if they crash into anything, they disappear.
They are similar to the player except for that the computer controls them.
The other cycles: violet, green, and blue, also move in a similar way. If the player crashes into anything, their cycle is 'zapped', even if they crash into their own trail. Wherever they go, they leave an orange trail. The player controls an orange line with a 'cycle' in front of it that can move up, down, left, or right. The objective of the game is to earn points by surrounding and eliminating opponents, the 'light-cycles'.
Quasar is a snake game written by Jonathan Dubman for the Apple II and published by Aristotle Software in 1983.