Hello.
Please start off with reading the Welcome Topic and then fix your post by properly formatting your code for viewability
Then tell us what you are having problems understanding… in detail, not just “help me”.
Be aware that we are here to help you Learn about Blynk… Not to fix your code, and not to teach you how to program.
Also… while awaiting further help, if available… you will read through the Documentation and the Help Center (all those links are at the top right of this page… scroll up if you can’t see them), as those pages will probably answer most of your questions.
Thank you.