Now you're just being mean.
I don't understand what to call the variables
You give variables meaningful name: pirSesnorPin, pirSensorState, lastPirSensorState, ledPin, ledState, etc...
how to summon them and get them to do anything
You don't summon variables; you either declare them:
Assign something to them:
pirSensorPin = 2;
or use their values in an experession or function call:
pirSensorState = digitalRead(pirSensorPin);
is it something to do with sacrificing chickens?
Now you're just being facetious.
It seems like it might be prudent for you to go through some of the examples first so that you can get a baseline understanding of programming concepts such as variables, assignments, selections and iterations.