To make the music clip play over and over again when Nathan runs his program, he can use a while loop or an infinite loop. Here's how each loop can be used:
1. While loop:
```python
while True:
# Play the music clip
```
In this case, the program will keep executing the steps inside the while loop indefinitely until it is manually terminated. The music clip will continuously play as long as the program is running.
2. Infinite loop:
```python
from itertools import count
for i in count():
# Play the music clip
```
The `count()` function from the `itertools` module enables creating an infinite loop with a for loop structure. The loop will continue indefinitely, and the music clip will play on each iteration.
Using a boolean loop is not a suitable option for this scenario as it requires a boolean condition to determine when to exit the loop, and continuously playing the music loop doesn't have a specific termination condition.