Space Buttons equally in Layout, but with an empty slot

This is a horrible way to pick a random slot It could easily loop many times before it finds that one empty spot, if there is an empty spot to

If slot is empty system allows car to enter the lot and displays empty slots where user can park To detect vehicle slot occupancy the system uses IR sensors

empty slot empty slot meaning, empty slot definition

empty the bank slot png I am trying to make a function that will return the first “empty” slot in an array Lets pretend I have an array that looks like