body {font: 20px Arial;
      color: red;
}
div{
  width:200px;
  height:200px;
  border: solid 2px black;
}
@keyframes pozadi {
  from{background-color: white;}
  to{background-color: blue;}
}

.trida1{animation: pozadi 3s infinite;}

@keyframes trida2{
  from{border: solid 2px black;}
    to{border: solid 2px yellow;}
}

.trida2{
  animation: trida2 3s infinite;
}

@keyframes trida3 {
  from{color:red;}
    to{color:lime;}
}
.trida3{animation:trida3 3s infinite;}

@keyframes trida4 {
  from{padding: 0px;}
    to{padding: 50px;}
}
.trida4{animation: trida4 3s infinite}