what does this error mean (avrdude: stk500_getsync(): not in sync: resp=0x00)

IDK more what to do.

There is a sticky at the top of the forum. It says that if you are posting on the Programming section, you post your code. Without your code, how can we possibly help you?

Without your code, you can bump until the cows come home, and you'll just be wasting your time, and ours.