Meet Andre Amador.
He's an artist and his medium is a sandy beach.
His artwork is intricate, but can exceed 100,000 square feet.
He uses a rake to create art that will disappear when the tide comes in.
He uses a rope as a guide to lay out these geometric patterns.
He rakes up sand at low tide, to create contrasting sand colors.
Sometimes he helps people propose.
He says it usually takes a few hours to create his sand paintings.