.fulltask
{
    
background-color:#ffffcc;
position: absolute;               /* 2 */
top: 50%;
left:50%;
text-align:center;
border:1px solid black;
transform:scale(3);
white-space:pre-wrap;    
}
.screen
{
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    overflow: auto;
    white-space: nowrap;
    text-align: center;
    font-size: 0;
    background-color:red;
}

body
{
    background-color:black;
}