Module screen
Functions to manipulate screen
Functions
| isclosing () | Checks if the program will be closed. | 
| getwidth () | Gets the width of the screen | 
| getheight () | Gets the height of the screen | 
| getfps () | Gets the frames per second | 
| setfps () | Sets the frames per second | 
| getdeltatime () | Gets the time in seconds since the last screen update | 
| clear () | Clears the buffer using the default background colour and prepares the library to draw | 
| flip () | Sets the library to stop drawing and show the buffer onto the screen. | 
Functions
- isclosing ()
 - 
    Checks if the program will be closed.
    
Returns:
- 
        true if the program will be close, false otherwise.
    
 
 - getwidth ()
 - 
    Gets the width of the screen
    
Returns:
- 
        int current screen width
    
 
 - getheight ()
 - 
    Gets the height of the screen
    
Returns:
- 
        int current screen height
    
 
 - getfps ()
 - Gets the frames per second
 - setfps ()
 - Sets the frames per second
 - getdeltatime ()
 - Gets the time in seconds since the last screen update
 - clear ()
 - Clears the buffer using the default background colour and prepares the library to draw
 - flip ()
 - Sets the library to stop drawing and show the buffer onto the screen.