for initial in 'A'..='Z' {
        let tx = tx.clone();
        let client = client.clone();
        tokio::spawn(async move {

    tokio::spawn(async move {
        for initial in 'A'..='Z' {

                tokio::time::sleep(std::time::Duration::new(10,0)).await;

        });
    }

        }
    });

    let mut offset = String::new();

    let offset;

tokio = { version = "1.15.0", features = ["macros","sync","rt-multi-thread"] }

tokio = { version = "1.15.0", features = [
  "macros",
  "sync",
  "time",
  "rt-multi-thread"
  ] }