Making a Countdown

Create a function where given the number n to count down from, and some words txt, return a countdown sequence as a string leading up to the words at the end.

Put a full stop after each number and uppercase and add an exclamation mark to the word. See the examples below for clarification!

Examples

countdown(10, "Blast Off") ➞ "10. 9. 8. 7. 6. 5. 4. 3. 2. 1. BLAST OFF!"

countdown(3, "go") ➞ "3. 2. 1. GO!"

countdown(5, "FIRE") ➞ "5. 4. 3. 2. 1. FIRE!"

Notes

• n will be a number greater than 0.
• txt won't already include an exclamation mark.
• Don't include 0 in the countdown.