* {margin: 0; padding: 0}

body img {width: 100%; height: 300px}

#writing {
width: 300px;
height: 50px;
position: absolute;
top: 125px;
left: 50%;
margin-left: -150px
}

#button {
width: 100px;
height: 25px;
display: none;
position: absolute;
top: 25px;
left: 50%;
margin-left: -50px;
text-align: center;
border: 1px solid;
line-height: 25px;
cursor: pointer;
opacity: 0.5
}