The code includes two Arduino libraries: one for the servo and another for the ultrasonic sensors. The main code is a simple 14-line piece with a simple if-else statement you can readily modify.

Most already come complete with the UNO board and a bunch of components like LEDs, a temperature sensor, a DC motor, a servo motor, and an LCD module. Then, there's the matter of the power supply.

We don’t know about you, but for some of us, we were satisfied with blinking two LEDs instead of just one. [Greg06’s] robot has a quadruped based, housed within a 3D printed spherical body.