We made our robot, Einstein, to have a touch sensor. Einstein was built with two sensors when we started, but now he only has one. We had a lot of problems in the beginning. Every time we touched the light sensor, it would break. So we thought it would be much easier to just forget about it. Also, we had trouble with the turning this way and that way. It would always go in a squiggly line, it still does. The robot has two wheels, four gears, and one sensor, a touch sensor. A few times we thought that Einstein's battery was dead. But Mr. Cattanach helped us with our problem. Now it's working 100%, and we're really happy with what our hard work has done! To Einstein ac, setpower 3 ac, onfor 50 ac, off setpower 8 ac, onfor 30 coast c, onfor 10 ac, onfor 20 ac, off a, onfor 10 repeat 3 [ beep wait 10] setpower 8 ac, onfor 30 coast end to test ac, setpower 1 ac, thisway ac, on if switch2 [ac, off rd onfor 10] off end What our robot does: Our robot first goes on power 3 out of 8 forward for 5 seconds. Then it goes on power 8 out of 8 for 3 seconds. Next it turns left for 1 second on power 8. After that our robot goes forward for 2 seconds. Right for 1 second is what our robot does next. Then it beeps 3 times while stopped. The last thing our robot does is it goes forward for 3 seconds. You may notice the 'to test' just before these paragraphs. We could not get our touch sensor working so when we tried to get it working we used 'to test'.