now duplicate the object and draw and othe circle in the midle
Select all object and p inthe key board to put them in centre
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Now select the the small circle and the medium and apply intersection
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Now lets color our CD
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use the gradient tool
STEP-2
using the 2 oval circls and 3 rectangle we are going to create the second object
Now weld them
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Now lets add the light effect
use 2 circle and 3 rectangle
Now add the transparency
now resize it
Done...