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.

In the setup() function we set the pins were the LDR are connected as INPUTs and position the servo motor at 90° then wait for a 2 seconds before the code execution inside the loop(). In the loop() we ...