They are raked into beach sand and are sometimes spontaneous and free-flowing, sometimes geometric and precise.
Their beauty, however, is always fleeting, waiting to be washed away.
When the tide takes away his work, he is left with a blank slate to start again.
Mr Amador, who calls himself an “earthscape artist”, was educated as an environmental scientist and previously worked in computer programming.
He gave up his job 10 years ago to pursue his artistic passion.
He uses a camera mounted on a quad-copter to take high sky images of his designs, which he then sells online.