Hello
very Informative post for storing your values you can do -
Saving a value to EEPROM
Don't write multiple values on the same address, otherwise you will lose the previously written number (unless that's what you want to do)
A memory location can only store one byte of data.
Don't write a value to the EEPROM inside an infinite loop without any delay or check for user input.
Hope so it will helps you
dinar chronicles