.container{
     display: flex;
     justify-content: center;
     align-items:center;
     height:100vh;
}
.button{
     display:flex;
     position:absolute;
     top: 500px;
     left:600px;
     width:60px;
     height:60px;
     border-radius:5px;
     animation : buttlu 2.5s ease-in-out infinite;
}
@keyframes buttlu {
    0%{
        transform : translateY(0);
        background-color:red;
    }
    50%{
        transform : translateY(-30px);
        background-color:rgb(56, 106, 180); 
    }
    100%{
        transform : translateY(0);
        background-color:red; 
    }
}

.hikki{
     display:none;
     background-color: red;
     position:absolute;
     top:300px;
     left:400px;
     height:60px;
     border-radius:20px;

}

.hikki.open{
     display:flex;
}