'''
In this exercise, you will simulate the random movement of a particle.

**Exercise A:**
Generate random values for `dX` and `dY` between, for instance, -5 and 5. The 
particle should not be allowed to move outside the graphical window. You can 
change the speed at which the particle moves by varying the range of your 
random values.

**Exercise B:**
Extend your code such that instead of one particle,your program works with 
100 particles and makes them move randomly. 

Hints: 
- You'll need a list with the `x` coordinates for the particles, and a list 
with the `y` coordinates for the particles. 
- Perform separate tasks in separate loops. 
- When you update your graphical window for every particle individually, your program will slow 
down. To avoid this, first change the coordinates of all particles and draw them to the graphical 
window before updating it.
'''