You have a raspberry pi connected to all the sensors and a code running to trigger if the sensors are triggered. Each sensor and keypad would run to a different input on the pi. They should al be able to be powered with a single cell lipo. Is that what you are asking?
It is just a declaration of an object variable, <em>person</em>, in JavaScript. Within a <em>person</em> object, there are key:value pairs. The code that you shared has the following keys: name, age, and favouriteFood, whereas the values of those keys are: Mike, 25, and pizza.
There is <em>no</em> alert statement in this code snippet; therefore, it <em>will not alert </em>anything. This code contains only a variable called <em>person, </em>and that's it!
Answer:
Its the last one, CSS and HTML are similar but like it says some prefer one over the other.
