```rust use std::env; use rust_blockchain::blockchain::Blockchain;
fn main() {
// Collects all command line arguments into a Vector
let args: Vec
if args.len() >= 2 {
// Convert argument one to an unsigned 32 bit integer
let amount: u32 = args[1].trim().parse().unwrap();
for i in 1..=amount {
// Add a transaction
test.add_transaction(format!("Transaction {}", i));
// Mine blocks
test.mine();
}
} else {
for i in 1..=25 {
// Add a transaction
test.add_transaction(format!("Transaction {}", i));
// Mine blocks
test.mine();
}
}
}
```