Clocks in PyGame can be used to track an amount of time and control a game's FPS. The clock submodule is a child module of pygame.time.
You can start by initializing a Clock object using the following command.
```Python
pygame.time.Clock()
```
You can use the tick method to update the clock and also control framerate. This method should be called once per frame. The optional framerate parameter will set the maximum framerate of your game--for example, passing in 40 will ensure your game never goes above 40 FPS.
```Python
pygame.time.Clock.tick(frames)
```
You can get the time that has passed between the last two calls to Clock().tick() by using get_time.
```Python
pygame.Clock.get_time()
```
You can also compute the framerate (by taking the average of the last ten calls to Clock.tick()) by using get_framerate.
```Python
pygame.get_fps()
```

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Time is represented in milliseconds. The time module is used for retrieving the time and creating clocks.
To get the time that has passed since pygame.init() was called, use the following command:
```python
pygame.time.get_ticks()
```
Both the wait and delay methods will pause the program for a period of time, with wait sleeping the program and using less processor time, but being less accurate as a result. Delay is more accurate but uses the processor to pause the program. You just pass in the amount of time (in ms) you want to pause the program.
```python
pygame.time.wait(milliseconds)

pygame.time.delay(milliseconds)
```
You can also set an event to appear every certain number of ms on the event queue using the set_timer method. Once is an optional parameter that, when set to True, will only call the event once.
```python
pygame.time.set_timer(eventid, time, once)
```
Clocks can also be created to help track time, and have a number of methods that can be used with them.

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