section img {
  position: absolute;
}
.percentage {
  position: absolute;
  bottom: 10px;
  left: 10px;
}

.box {
  width: 100px;
  height: 100px;
  position: absolute;
  border: 5px solid lightgray;
  margin: auto;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
}

.pcside{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.pcfront{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}

#PC1{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
#PC2{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
#PC3{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
#PC4{
  transition: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}