<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Yanıp Sönen Buton</title>
<style>
@keyframes flash {
0% {
background-color: red;
}
50% {
background-color: yellow;
}
100% {
background-color: red;
}
}
.flashing-button {
padding: 10px 20px;
border: none;
color: white;
font-size: 16px;
cursor: pointer;
animation: flash 1s infinite;
}
</style>
</head>
<body>
<button class="flashing-button">Yanıp Sönen Buton</button>
</body>
</html>