This is a first iteration. Yes, it could be improved. I'm only showing part of the poster and only attempting to make a part of it digitally using Turtle Art:
Turtle Art image:
BREAKING IT DOWN
To draw a single dot:
The turtle begins in the centre
penup
forward 100
pendown
set color 0 (0 = red)
set pensize 8 (determined by testing different numbers)
forward 0 (this is how to draw a dot)
penup
back 100 (return the turtle to the centre)
To draw a circle of dots:
repeat 360 [single dot then right 1]
But then the dots are too close together, so increase right 1 to right 2 or 4 or 9 (factors of 36)
repeat 40 [single dot right 9]
9*40 = 360 (the turtle makes one complete trip around the circle)
The next diagram just shows the code to do the background and a circle of red dots:
Next step
To draw a slightly bigger circle of orange dots
Duplicate the red circle code
Increase forward 100 to forward 110 and increase back 100 to back 110
Change set color 0 (red) to set color 10 (orange)
The next diagram shows the code for doing the orange circle:
Next: complete the cyan and blue dot circles
Duplicate the code again
Just increase the circle size and change the colours (cyan = 50, light blue = 60)
See the picture at the start
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