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To write while commands within while commands correctly and without errors, you need to ensure that each while loop has its own conditions and controls. Here are some tips on how to do this:

1. Use different loop control variables: Whenever you have nested loops, make sure to use different loop control variables. This will help you manage each loop independently and avoid infinite loops.

2. Define inner loop conditions: You need to define the conditions that determine how long the inner loop will execute. If the conditions are not specified, the loop may continue indefinitely, causing an error.

3. Break the nested loop: If needed, you can add a break statement inside the inner loop to terminate the loop early. This can help you prevent the loop from executing further if a certain condition is met.

4. Use indentation: To make your code more readable, use indentation to show which loop encloses the other. This will make your code easier to follow and debug.

5. Test your code: Always test your code by running it with different input values. This will help you identify any logical errors or syntax errors that need to be corrected.