- I have now implemented a two dimensional array so that I can choose
the position of the circles on the grid without having to specify a
value everytime. Using a grid I know that the top left most 'box' is
array grid[0][0]

- I have used a class to create the features for each circle in terms of
their centre coordinates and their colour

- Changed the draw_circle function so that it now takes a circle class
as a parameter and based on the pre-assigned values for each
characteristic of the circle it will create a circle with those
characteristics