ok i understand switches and that but what are variables for whats the difference between them and switches? And i would like to know how to use variables well and what things there best for doing and.1. can someone tell me how to make an event with more than 2 preconditions like- you have to hit all 4 switches to open a door

thanks in advance

"Try not! Do or do not, there is, no try!" Quote Yoda.