<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>무작위로 배경색 바꾸기</title> <link rel="stylesheet" href="style_js.css"> <body> <script> const letters = "0123456789ABCDEF"; let color = "#"; let count = 1; let intervalID = setInterval(changeColor, 1000); function changeColor() { if (++count > 25) clearInterval(intervalID); for (let k = 0; k < 6; k++) color += letters[Math.floor(Math.random()*16)]; document.write("<div style='background-color:" + color + "'>" + color + "</div>"); color = "#"; // 16진수 문자열 초기화 } </script> </body> </html>