LIsts in python

cogexp

I try to create a buffer where it is randomly selected a ** red circle** from a base of pixels (30,60,90,120,150),
and then five followed circles with the same values as in the red one but with gaps (-20,-10,-8,-6,-4,-2,0,2,4,6,8,10,20).
how do I fix the current code that it will also randomly select the first circle (red) and the other five in comparision
to the first circle?
Hope it was clear enough, thank you all .

Roelof

Hi Cogexp, would it be possible to have a look at the actual code instead of an image, otherwise we would have to retype all the lines to check what is going on.
Roelof
PS: I am also not sure what " selecting a ** red circle** from a base of pixels " means