1. using “if” statements

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3. example
add lines of code to your servo program similar to those below to make your robot move forward when nothing is blocking its path
if (distanceCM > 30) { forward(); } // go forward when leading robot > 30cm ahead
else { stop_robot(); } // stop robot otherwise

4. if statement details comparison operators if (x > 50)
{ // do something here }
comparison operators
x == y x is equal to y
x != y x is not equal to y
x < y x is less than y
x > y x is greater than y
x <= y x is less than or equal to y
x >= y x is greater than or equal to y
arduino.cc

5. play follow the leader with your robots
attach a target to the back with binder clips