bodi
{background-color:green; 
}
#Z
{
background-color:white;
position: absolute;
:background: rgb(63,94,251);
radial-gradient(circle, rgba(63,94,251,1) 0%, rgba(28,52,45,1) 0%, rgba(55,113,221,1) 0%, rgba(191,216,226,1) 0%, rgba(180,194,183,1) 0%, rgba(73,185,178,1) 45%, rgba(23,195,93,1) 68%, rgba(124,166,136,1) 77%);