* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.container {
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}
.img-container {
  position: relative;
  width: 450px;
  height: 450px;
  overflow: hidden;
}
.img {
  position: absolute;
  width: 100%;
  height: 100%;
}
img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  mix-blend-mode: screen;
  background-color: #30a4fd;
}
.img-blocks {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  flex-flow: row wrap;
  align-content: space-between;
  justify-content: space-between;
}
.block {
  width: 50px;
  height: 50px;
  opacity: 0;
  mix-blend-mode: hard-light;
  background-color: #89fff9;
  transition: opacity 0.3s ease-in;
}
.block.active {
  opacity: 0.75;
}