plates with black rings

Created with JWildfire [link]
One of my favourit creation with this program
I very appreciate it
The params which you can copy with Apo too:
<flame name="69c" version="JWildfire 0.60 Xmas edition (24.12.2012)" size="1680 1050" center="0.09057540362765856 -0.12803991175883542" scale="347.3020322432774" rotate="0.0" oversample="1" color_oversample="1" filter="0.2" quality="4.0" background="0.0 0.050980392156862744 0.0" bg_transparency="0" brightness="3.79" gamma="2.1" gamma_threshold="0.0" estimator_radius="9" estimator_minimum="0" estimator_curve="0.4" temporal_samples="1.0" cam_zoom="1.0" cam_pitch="0.06981317007977318" cam_yaw="0.8290313946973066" cam_persp="0.4855" cam_zpos="0.028" cam_dof="0.0" de_filter_radius="7" de_filter_amount="0.0" shading_shading="FLAT" >
<xform weight="0.15" color="0.28904783776461196" symmetry="-0.65" pre_blur="3.68" lazysusan="0.87" lazysusan_space="0.75" lazysusan_twist="0.2" lazysusan_spin="0.1" lazysusan_x="0.1" lazysusan_y="0.2" coefs="-0.65786 0.0 0.0 0.56214 0.0 0.0" chaos="1.0 1.0 0.0" />
<xform weight="1.85" color="0.3475678382633802" symmetry="-0.96" crop="0.48" crop_left="-1.0" crop_right="1.0" crop_top="-1.0" crop_bottom="1.0" crop_scatter_area="0.0" crop_zero="0" bubble="0.172" coefs="0.132515 0.494554 -0.494554 0.132515 -0.05 0.0" chaos="1.0 0.0 1.0" />
<xform weight="2.0" color="0.038216124816700225" symmetry="0.0" julia3D="-1.77" julia3D_power="-2" zcone="0.005" coefs="1.0 2.4492935982947064E-16 -2.4492935982947064E-16 1.0 1.1959654178674355 0.09128878281622912" chaos="1.0 0.0 1.0" />
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</flame>