.test-container {
 height: 1500px;
 width: 1500px;
}

.tip-a {
 position: absolute; 
 top: 1%;  
 left: 80%;
}

.tip-b {
 position: absolute; 
 top: 90%;  
 left: 5%;
}

.tip-c {
 position: absolute; 
 top: 90%; 
 left:  80%;
}

.tip-d {
 position: absolute; 
 top: 1%; 
 left: 5%;
}