.tip-b {
 position: absolute; 
 top: 400px; 
 left: 700px  
}

.tip-a {
 position: absolute; 
 top: 0px; 
 left: 600px   
}

.tip-c {
 position: absolute; 
 top: 666px; 
 left: 666px;
 
}

.tip-d {
 position: absolute; 
 top: 0px; 
 left: 200px   
}