Google is celebrating the festival of Holi with a hidden doodle.

Unlike other celebrations on Google's homepage, you are unlikely to find or see the Holi feature unless you actively look for it.

But once you do, you can create an explosion of colours that will brighten up your search results page.

The update celebrates the ancient Indian festival of Holi. The festival of colour is traditionally celebrated by throwing coloured paints and powders at one another, creating a vibrant mix of colours.

Now Google is allowing people to do the same on their website, and is giving them an easy way to clean up, too.

Best pictures from 2020 Holi festival of colours Show all 10 1 /10 Best pictures from 2020 Holi festival of colours Best pictures from 2020 Holi festival of colours Students in Kolkata, India take part in a procession to celebrate Holi, wearing pink, yellow, orange and red ensembles. Photo by Dibyangshu SARKAR / AFP Best pictures from 2020 Holi festival of colours Pupils participating in the procession dance in celebration of Holi. AFP via Getty Images Best pictures from 2020 Holi festival of colours A participant holds a tray of different coloured powders. AFP via Getty Images Best pictures from 2020 Holi festival of colours A woman and her child in Kathmandu, Nepal arrive to mark the annual festival AFP via Getty Images Best pictures from 2020 Holi festival of colours Revellers in Kathmandu, Nepal throw coloured powders in the air. AFP via Getty Images Best pictures from 2020 Holi festival of colours A couple taking part in the festivities wear face masks, as a protective measure against the spread of coronavirus. AFP via Getty Images Best pictures from 2020 Holi festival of colours A woman wears a mask as she stands among fellow revellers enjoying Holi festivities in Kathmandu. AFP via Getty Images Best pictures from 2020 Holi festival of colours Children joyfully play with coloured poweders. AFP via Getty Images Best pictures from 2020 Holi festival of colours Students in Kolkata line up for a Holi procession. AFP via Getty Images Best pictures from 2020 Holi festival of colours Pupils dance as part of an outdoor Holi celebration. AFP via Getty Images

The mode is activated by first searching for the word "Holi" on Google. You can do that on your phone or on desktop.

That will bring up a variety of results, but look for the "Knowledge Card", which aggregates Google's information about the festival.

Under that should be bowls of the kind of coloured powder used to celebrate the festival. Clicking those will cause a splat of colour to splash across the screen.

Once that's done, you can keep clicking as many times as you'd like, and will cover the screen with more paint as you do.

A little water droplet will appear at the top of the screen, and pressing that will clean all of that paint away for you to start again.