Pebbles Free

It´s a hot summer day, and under the deep blue sky, the ocean hums silently.
You lay down on the sand, blinded by the sun, refreshed by the cool breeze...
It´s time to play with the pebbles that the tide dragged in...
Use your imagination and rotate colorful pebbles of the same type into lines that then vanish.
Your objective? To make the most pebbles deasapear as fast as you can.