h2{
  color: white;
  background:linear-gradient(#05FBFF, #1E00FF);
}

div#canvascss{
  margin: 10px 10px 10px 100px;
}

div#C{
  position: absolute;
  top:300px;
  left:520px;
}

div#U{
  position: absolute;
  top:300px;
  left:670px;
}

div#back{
  position: absolute;
  top:500px;
  left:670px;
}

h4.go_1{
  position: absolute;
  top:189px;
  left:85px;
}

h4.go_2{
  position: absolute;
  top:120px;
  left:140px;
}