html {

background-color:purple ;
    
}

body {
    
background-color: lightgoldenrodyellow ;
    
}

table {
    
margin: auto ;
background-color: lightgrey ;
border-spacing: 16px ;

}

td {
    
width: 404px ;
height: 404px ;
text-align: center ;
font-size: 2em ;
color: cornflowerblue;
    
}

#R1C1 {
    
background-color: #ffff00 ;
background-image: url("radiation-128.png") ;
background-repeat: no-repeat;
background-position: top left ;
    
}

#R1C2 {
    
background-color: #ff7f00 ;
background-image: url(biohazard-128.png) ;
background-repeat: no-repeat ;
background-position: top ;
    
}

#R1C3 {
    
background-color: #ffffff ;
background-image: url(yin-yang-128.png) ;
background-repeat: no-repeat ;
background-position: top right ;
    
}

#R2C1 {
    
background-color: #ff7f00 ;
background-image: url(biohazard-128.png) ;
background-repeat: no-repeat ;
background-position: left ;
    
}

#R2C2 {
    
background-color: #ffffff ;
background-image: url(yin-yang-128.png) ;
background-repeat: no-repeat ;
background-position: center ;

}

#R2C3 {
    
background-color: #ffff00 ;
background-image: url("radiation-128.png") ;
background-repeat: no-repeat;
background-position: right ;    

}

#R3C1 {
    
background-color: #ffffff ;
background-image: url(yin-yang-128.png) ;
background-repeat: no-repeat ;
background-position: bottom left ;
     
}

#R3C2 {
    
background-color: #ffff00 ;
background-image: url("radiation-128.png") ;
background-repeat: no-repeat;
background-position: bottom ;    
    
}

#R3C3 {
    
background-color: #ff7f00 ;
background-image: url(biohazard-128.png) ;
background-repeat: no-repeat ;
background-position: bottom right ;    
    
}