body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.ground {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.relative {
  width: 300px;
  height: 400px;
  position: relative;
}


/* -------- Ball -------  */
.ball {
  z-index: 5;
  width: 100px;
  position: absolute;
  bottom: 220px;
  left: 50px;
  animation: ball .5s ease-in 0s infinite alternate ;
}

/* -------- Bat ------- */
.bat {
  z-index: 4;
  position: absolute;
  bottom: 150px;
  width: 300px;
  animation: bat 0.5s ease-in 0s infinite alternate ;
}

@keyframes bat {
  0% {
    transform: rotate(-30deg);
    transform-origin: right bottom;
  }
}
@keyframes ball {
    0%{
        bottom: 600px;
        transform: rotate(180deg);
    }
    
}