Make several copies of the circles colored this time in
9966A8 and
B286BF, changing also the parameters by applying the
Free Transform option.

Several copies must have the orange color:

Copy several circles and change their color in
70B9B7 and make use again of the
Free Transform option to change the circles’ parameters:

A certain quantity of the copies must have this color –
E64141.

And several more colored in different colors and having different dimensions. The
Stroke parameter also should be different.