To do this in Arduino/C code, a new intermediate position for the servo is specified for each main loop until it reaches the final position.

The android consists of a servo unit with 17 degrees of freedom made up of 17 servo motors. Each motor measures 0.85 x 0.33 x 1 inch and features a maximum of 220 degrees of movement and built-in ...

You'll definitely need some gear for it—the Arduino for one, but also a PIR motion sensor, not to mention the (cleaned and rinsed!) Raid Power Sprayer motorized spray bottle.