Hidden Spheres

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2019-08-23-210455-447b393-013723#ico_minus">