![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgMUHWV_II08flaE2dZk5mEODTprlwveHxElNZKMu-F-_aRQJ4VimCl0qbza3BvAPb-t70CEsYZZ92RNfphWgYZg78V981CIeShKagIQ1MxHqpmbBQVmaCowQmrF_akojtIo7dFCQ/s200/cpc.jpg)
The robot drives around in a path specified by the sequence of colored balls in the NXT set. Using Mike's words: If you throw in a ...
- green ball it will drive forward until the ultrasonic sensor detects an obstacle
- yellow ball it will turn approximately 90 degrees to the right
- red ball it will drive forward 0.5 m
- blue ball it will turn approximately 90 degrees to the left