.test {
    background:gray;
    width:500px;
    height:500px;
    cursor:url(1.png), auto;
  }

  /* body:hover {
      background-color: white;
  } */

  .abc  {
    position: relative;
    width: 100%;
    height: 100%;
  
}
  img{
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: auto; /* to keep proportions */
    height: auto; /* to keep proportions */
    max-width: 100%; /* not to stand out from div */
    max-height: 100%; /* not to stand out from div */
    margin: auto auto 0; /* position to bottom and center */
    filter: brightness(0.8);

  }
  .buttons > img{
      position: relative;
      top: 0;
      width: 30vh;
  }


/* 
  .abc > img:hover {
    filter: brightness(0.3)
  }
 */
 #confetti{
	background: #000;
	height: 100%;
	left: 0px;
	position: fixed;
	top: 0px;
	width: 100%;
	z-index: -1;
}


HTML CSSResult Skip Results Iframe
EDIT ON
html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    background: #000;
}

.glow-on-hover {
    width: 220px;
    height: 50px;
    border: none;
    outline: none;
    color: #fff;
    background: #111;
    cursor: pointer;
    position: relative;
    z-index: 0;
    border-radius: 10px;
}

.glow-on-hover:before {
    content: '';
    background: linear-gradient(45deg, #ff0000, #ff7300, #fffb00, #48ff00, #00ffd5, #002bff, #7a00ff, #ff00c8, #ff0000);
    position: absolute;
    top: -2px;
    left:-2px;
    background-size: 400%;
    z-index: -1;
    filter: blur(5px);
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    animation: glowing 20s linear infinite;
    opacity: 0;
    transition: opacity .3s ease-in-out;
    border-radius: 10px;
}
 .buttons{
    display: flex;
    position: absolute;
    z-index: 1;
    flex-direction: column;
    
}

.glow-on-hover{
    margin: 40;
    padding: 40;
} 
.glow-on-hover:active {
    color: #000
}

.glow-on-hover:active:after {
    background: transparent;
}

.glow-on-hover:hover:before {
    opacity: 1;
}

.glow-on-hover:after {
    z-index: -1;
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: #111;
    left: 0;
    top: 0;
    border-radius: 10px;
}

@keyframes glowing {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}