Failuer is not the end, rather it is a beginning

"Our greatest glory is not in never falling but in rising every time we fall."
Confucius

"Only those who dare to fail greatly can achieve greatly."
~ Robert F. Kennedy
Quoted from this location

Every time we fail we learn something different which we would have not done if we had succeeded. Never give up.

I have failed so many times when trying to make the program work for specific functionality. But all those failure scenarios are very useful down the line sometime. The extent of happiness and feeling of achieved something gives satisfaction and energy to proceed better.