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<!DOCTYPE html> <html> <head> <style> /* Write CSS Here */ </style> </head> <body> <h2>Change background color every second</h2> <script> // Triggers every second function changeColor(){ let randomColor = Math.floor(Math.random()*16777215).toString(16); document.body.style.backgroundColor = '#'+randomColor; } setInterval(changeColor, 1000); </script> </body> </html>