Explorer robot 2(application model)

This model is the explorer robot I had posted before. But I added one more IR sensor in the left side and make it to move along the wall detection.
Here's the example programming source. This has 2 programming in one.
If you press touch sensor, this model will work out to avoid obstruction.
But if left side of IR sensor in front detects obstruction, this model will work out to trace along the wall.



I added this program as below.