*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body{
    width: 100%;
    height: 100%;
}


#bulb{
    width: 300px;
    height: 300px;
    border: 3px solid black;
    border-radius: 50%;
    /* background-color: transparent; */

    margin: 100px 0 0 100px;
}

button{
    padding: 20px;
    margin: 30px 0 0 200px ;
}