.block {
    background-color: green;
    padding: 1em;
    margin: 2em;
    font-family: "Comic Sans", cursive;
    text-align: center;
    color: white;
    display: block;
    position: relative;
}
.block::before {    
      content: "";
      background-image: url('./P5R-PV-Futaba_07-23-19.jpg');
      background-size: block;
      position: absolute;
      top: 0px;
      right: 0px;
      bottom: 0px;
      left: 0px;
      opacity: 0.20;
}
body {
    background-image: url("./images.jfif");
    background-color: lightgreen;
}

label, p, h1{
    position: relative;
    display: block;
    opacity: 100%;
}