Create a Blinking Effect on click of any object in the scene

Hi Guys,
Please help me with providing a better approach to achieve blinking effect on click of any mesh in the scene.

I am new to Three.js and i am into a project where we user can create mesh with different size and color and user can also click on objects and edit there size and color.

Now i am stuck. There are 2 scenarios single click and select a mesh or drag and create frustum / multi select objects. Both cases i need to give blinking effect to selected objects.

Please help me with this.

thank you